bibliometrix V.5.3.1

New Features
- completeMetadata(): new function to complete missing bibliographic metadata via DOI lookup against OpenAlex and Crossref. Existing values are never overwritten. Provenance is recorded both as a per-row M$ENRICH column (compact tags like "AB:OA; TC:OA; CR:CR") and as a long-format attr(M, "enrichment") data frame (SR, field, source, timestamp).
    - Two-pass orchestration: OpenAlex runs first (broader coverage of AB/CR/C1/TC), Crossref then fills residual gaps. OpenAlex is auto-skipped when the source DB is OpenAlex (M$DB[1] == "OPENALEX").
    - TC handling matches missingData() semantics: TC = 0 is treated as vacant only when the entire column sums to zero (the same collection-level rule used by the audit table), so Scopus exports with all-zero citation counts get refreshed via OpenAlex while collections with mixed legitimate zeros are left untouched.
    - Honest per-source field coverage matrix: ID (Keywords Plus) and WC (WoS categories) are always skipped (WoS-proprietary); TC requires the OpenAlex pass; DE is off by default for both sources.
- Biblioshiny: new Complete and Undo buttons in the Missing Data audit modal. The Complete sub-modal pre-selects fields with status Poor/Critical/Completely missing and reads the polite-pool email and OpenAlex API key from the Settings panel (no per-modal credential typing).
- Biblioshiny: new before/after comparison modal opened after each enrichment, showing per-tag Before %, After %, Delta %, and the number of cells filled by OpenAlex vs Crossref, plus an Undo path that restores the pre-enrichment collection.

Changes:
- Biblioshiny: Minor fix in table layout for numeric columns

Bug Fixes and Improvements
- Biblioshiny - Metadata completion result: fixed the Before/After modal showing identical percentages. The "after" snapshot is now read from the value returned by completeMetadata() rather than from the reactive table, which was stale because its modal was already closed.
- Biblioshiny - Metadata completion result: the Delta column is now rendered as a coloured badge (blue down-arrow for improvement, red up-arrow for regression) so the gain from each enrichment pass is immediately visible. A small icon prefix prevents renderBibliobox from auto-detecting the column as numeric and silently stripping the HTML.
- Biblioshiny - Synonym / Stopword pop-ups: the modal used to render very narrow because popUpGeneric() defaulted to size = "40%", which is not a valid show_alert() enum and was silently dropped. Switched to size = "l" and added white-space: nowrap to the term column so single words like "bibliometrics" or "entrepreneurship" no longer break mid-word.
- Biblioshiny - Unified Text Editing layout: the Stop Words / Synonyms boxes in Most Frequent Words, WordCloud, Treemap, Word Dynamics and Trend Topics now use the same panel layout (orange "Stop Words" panel + green "Synonyms" panel with icons) as the Co-occurrence Network menu. Existing input ids are preserved, no server-side change required.
- Biblio AI model selection:
  - Add open Gemma 4 models (gemma-4-31b-it, gemma-4-26b-a4b-it) via the Google Gemini API. gemini_ai() now handles their bare model id (no "gemini-" prefix), drops the unsupported `seed` field and caps output tokens for Gemma models.
  - Parse "thought" parts for thinking models so the answer text is returned instead of the reasoning trace.
  - Retry transient 5xx server errors (500/502/504), not only 429/503.
  - Group the model dropdown into "Free tier" / "Paid API key required".
  - Default to Gemini 2.5 Flash Lite on first launch.
- Co-occurrence Network:
  - New "Documents" tab: fuzzy assignment of documents to network clusters, reusing clusterAssignment() (the same engine as the Thematic Map).
  - Include the document-to-cluster table in the Excel report.
  - Feed the three most central documents per cluster to Biblio AI through the shared doc2clust() helper (same approach as the Thematic Map).
- clusterAssignment(): coerce TC/PY to numeric to avoid an error on collections where TC is imported as character (affects Thematic Map too).

bibliometrix V.5.3.0 (Release date: 2026-04-10)

Major Changes
- New Table Rendering Engine: Replaced DT (DataTables) with a custom htmlBoxFormat engine for data visualization.
    - Improved UI Stability: Fixed a long-standing glitch where column names would occasionally wrap or misalign in high-density dashboards.
    - Enhanced Performance: Optimized client-side rendering using a lightweight vanilla JavaScript implementation for sorting, filtering, and pagination.
    - Uniform Design: Introduced a new "Bibliobox" style that ensures consistent aesthetics across all analysis modules.
    - Better Data Handling: Improved DOI and URL handling in tables; the filtering and sorting logic now correctly ignores underlying HTML tags (like links) to focus on visible text.

Performance and User Experience Improvements
- Asynchronous Processing: All Biblioshiny analyses now run asynchronously, keeping the UI responsive during long-running operations.
- Async AI Integration: AI API calls (Gemini and OpenRouter) are now non-blocking with proper timeout handling and exponential backoff on retries.
- AI Summary Button: Added AI-powered document summaries in Most Global/Local Cited Documents tables.
- Function Optimization: Optimized heavy functions including rpys(), cocMatrix(), and table rendering for better performance.
- Power-off Button: Added a power-off button in Biblioshiny to properly shut down the application.
- Max Rows Control: Added max.rows argument in biblioshiny() to control the maximum number of rows displayed in tables.

New Features
- Add PRISMA Flow Diagram module to Biblioshiny
- Added OpenAlex API key settings panel and warning banner for unauthenticated access.
- Added email setting for polite use of the OpenAlex AI features.
- Improved cited reference (CR) download from the OpenAlex API.

Technical Improvements
- Added renderBibliobox server-side wrapper to simplify the migration from renderDT and provide global error handling via tryCatch.
- Implemented responsive horizontal scrolling for wide datasets while maintaining fixed headers for better readability.
- Refined pagination logic to handle large datasets more gracefully with dynamic page indicators.
- Implemented future/promises for non-blocking API calls with req_timeout(120) to HTTP pipelines.
- Cleaned up async AI pipeline, removing unused geminiGenerate() and geminiPromptImage() functions.

Bug Fixes
- #591 [Solved] - Synced the country dictionary with the latest ISO 3166-1 standard.
- Fixed reference matching algorithm.
- Fixed plot resize issues.
- Fixed thematic evolution display issues.
- Fixed chromium compatibility issues on Ubuntu server.
- Improved author name formatting.
- Fixed Biblioshiny crash and empty HTML downloads when clicking download/screenshot buttons before running the analysis. All export buttons are now disabled until results are available.
- Fixed OpenAlex API error 400 when searching by Author or Concept fields. Entity-based fields now use a two-step ID resolution approach compatible with the current OpenAlex API.


bibliometrix V.5.2.1 (Release date: 2025-12-11)

Changes:

* Removed old geemini models 1.5 and 2.0 from biblioAI
* Solved issue with internet connection checking in MS Windows systems


bibliometrix V.5.2.0 (Release date: 2025-11-04)

Features:

* Added Author Bio Card (new function AuthorBio())
* Added new plot layout in plotThematicEvolution()
* Added automatic identification of continuous flows in plotThematicEvolution()
* Added seed argument to networkPlot(), ThematicMap(), and ThematicEvolution() functions
* Improved OpenAlex data conversion process
* Enhanced Community Repulsion algorithm in networkPlot(), ThematicMap(), and ThematicEvolution() functions
* Added Citation Matching algorithm (new function applyCitationMatching())
* Added Life Cycle Analysis (new function lifeCycle())
* Biblioshiny enhancements:
    - Added AI-powered article summaries
    - Added Author Profile feature (using OpenAlex data)
    - Added API Search and Download menu for OpenAlex and PubMed
    - Removed API support for Dimensions.ai
    - Added Content Analysis menu (using contentanalysis library)
    - Improved parameter layout across all analyses
    - Added seed parameter in Settings
    - Added Life Cycle Analysis menu

Changes:

#564 [Solved] - bibliometrix now supports the new Scopus CSV format (both for data import and local citation analyses)


bibliometrix V.5.1.1 (Release date: 2025-09-02)

Features:
* Biblioshiny - Filters - Added the possibility to upload a journal ranking list and filter publications by a ranking subset
Changes:
* Biblioshiny - Added check and automatic update for imported packages: curl package (>= 6.3.0)

bibliometrix v.5.1.0 (Release date: 2025-07-15)

Features:
* rpys(): 
    - Added the possibility to choose between two different median window approaches (centered or backward)
    - Added the algorithm to identify citation sequences and influencial references ("Hot papers", "Constant Performers", "Life Cycles", and "Sleeping Beauty")
    - Added these results also in Biblioshiny outputs.
* Biblioshiny:
    - Added Animated Diachronic Networks in Conceptual and Social Structures.
    - The Filters menu has been completely redesigned. It now follows a J-AU-DOC approach and includes many more filters (such as Countries, Journals, Citations).
* Biblio AI: 
    - Improved prompt lists
    - Added new Gemini models (2.5 Flash and Flash-lite)
    
Changes:
* Solved issue in mergeDbSources(). Now when merging files from a single db, the function preserves the cited reference field
* Added automatic conversion of country ISO2 to country names for OpenAlex data in convert2df()
    
    
bibliometrix v.5.0.1 (Release date: 2025-06-05)

Features:
* Added a new function mergeKeywords() to merge DE and ID keywords in a new column 'KW_Merged'

Changes:
* Solved several issues in biblioshiny()
* The following functions have been modified to work with merged keywords (field 'KW_Merged'): 
  - tableTag()
  - cocMatrix()
  - biblioNetwork()
  - conceptualStructure()
  - thematicMap()
  - thematicEvolution()
  - threeFieldPlot()


bibliometrix v.5.0.0 (Release date: 2025-05-22)

Features:
* Biblioshiny 5.0 now includes Biblio AI – a powerful AI assistant for your science mapping analyses.

Changes:
* Solved several issues in biblioshiny()

bibliometrix v4.3.5 (Release date: 2025-05-11)
* Solved several issues in convert2df()
* Solved several issues in biblioshiny()

bibliometrix v4.3.3 (Release date: 2025-03-17)

Features:
* Improved the function plotThematicEvolution()
* Solved issue with synonyms in conceptualStructure()

bibliometrix v4.3.0 (Release date: 2024-06-30)

Features:
* Improved the function mergeDbSources()
  Now it's possible to merge collection from all supported databases
* Added the submenu "Merge Collections" in biblioshiny
  Through the new submenu "Merge Collections", it's possible to merge collections from different DBs directly in Biblioshiny

bibliometrix v4.2.3 (Release date: 2024-05-27)

Changes:
* Major fixes in bibliometrix functions

bibliometrix v4.2.2 (Release date: 2024-05-23)

Changes:
* Major fixes in bibliometrix functions
* Many improvements in Biblioshiny tables and figures 

bibliometrix v4.2.1 (Release date: 2024-05-01)

Changes:
* Major fixes in convert2df for Scopus and Lens export files
* Many improvements in Biblioshiny tables and figures 


bibliometrix v4.2.0 (Release date: 2024-04-18)

Features:
* Added the support to OpenAlex database both using export files and API
* Added the function net2Pajek to export network objects as Pajek files

Changes:
* Biblioshiny: Added an info page about supported databases and suggested format files
* Biblioshiny: In Conceptual Structure methods, added an algorithm to automatically hide overlapping labels 
* Biblioshiny: Added a popup window which shows the stopword list and the synonym list when uploaded
* Removed depencence from factominer package
* Many code and graphical improvements


bibliometrix v4.1.4 (Release date: 2023-11-29)

Changes:
* Biblioshiny: After the data quality check, the menus of the analyses that cannot be performed are hidden
* Start to adding support to OpenAlex data
* Improvements in historiograph: 
   - Improved Scopus algorithm to match local citations
   - Added OpenAlex algorithm to match local citations
   - Added Lens.org algorithm to match local citations
* Improved pajek export in biblioshiny
* Computational speed improvements
* Solved issue with igraph 1.6.0 release canddate 
* Solved issue with Matrix package

bibliometrix v4.1.2 (Release date: 2023-03-06)

Changes:
* Solved issue with new R version (R-devel no longer sets a 'stringsAsFactors' option)
* Computational speed improvements


bibliometrix v4.1.0 (Release date: 2023-01-13)

Features:
* Added a new function missingData() to check the completeness of metadata included in a bibliographic data frame 
* Biblioshiny: Added the ability to create an excel report by adding step by step results of different analysis
* Biblioshiny: Added a popup that returns the results of the metadata completeness check of imported collections
* Biblioshiny: Revamped interface with floating options menu and more space for graphical analysis results

Changes:
* Several bug fixes
* Computational speed improvements



bibliometrix v4.0.1 (Release date: 2022-09-16)

Features:
* Biblioshiny: Added longitudinal analysis for all units (Documents, Authors, Journals)

Changes:
* A lot of bug fixes


bibliometrix v4.0.0 (Release date: 2022-05-31)

Features:
* Biblioshiny has a completely renewed interface (Biblioshiny 4.0)
* All plots have new more readble sets of colors and fonts
* Added several new analyses in Biblioshiny

Changes:
* A lot of bug fixes


bibliometrix v3.2.1 (Release date: 2022-02-21)

Changes:
* shinythemes is no longer supported. It has been replaced by new bslib package


bibliometrix v3.2 (Release date: 2022-02-10)

Features:
* Added the possibility to load a list of terms to remove in all content analyses
* Added the new package logo in all plots

Changes:
* Improvements of scopus CSV file importing function
* Solved encoding issues about non UTF-8 character sets for bibtex files.


bibliometrix v3.1.4 (Release date: 2021-07-05)

Changes:
* Added the possibily to calculate all vertex centrality measures setting the argument type="all"
* Solved the issue with extracting cited sources from Scopus collections (function metaTagExtraction)
* Solved the issue related to exclusion of the ggnetwork package from CRAN by removing the dependence from the package 


bibliometrix v3.1.3 (Release date: 2021-05-25)

Changes:
* Solved issue in bibliometrix binaries for linux releases (from CRAN checks)


bibliometrix v3.1.1 (Release date: 2021-05-10)

New functionalities:
* Content analysis functions (conceptualStructure, biblioNetwork, biblioAnalysis, etc) include the analysis of bigrams and trigrams extracted from titles and abstracts 
* Three Field Plot: improved plot layout using plotly libraries
* splitCommunities: new function to create a network plot with separated communities
* histPlot: new, improved, plot layout
* fieldByYear: New Trend Topic Plot

Changes:
* Added bibliometrix logo in all plots
* networkPlot: Improved layout algorithms to obtain better separated clusters. The level of separation is guided by a new argument "community.repulsion"
* biblioshiny: Added maxUploadSize argument to biblioshiny(). Now it is possible to set any max upload file size for the biblioshiny app using the argument "maxUploadSize". The default value is maxUploadSize=200 (megabytes) 
* biblioshiny: Added the possibility to use a sample collection 
* biblioshiny: New layout for all frequency plots (sources, authors, docuemnts, etc.)
* couplingMap: Added the possibility to label clusters through content metadata (I.e. Keywords, title terms, etc.)
* Hindex: Huge improvements in execution time.


bibliometrix v3.0.4 (Release date: 2021-01-18 )

New functionalities:
* biblioshiny: added the option to export plots as png choosing dpi value and image height
* biblioshiny: added Coupling analysis by coupling menu tab
* biblioshiny: added automatic recognition of export file formats in Data menu
* couplingMap: new function performing coupling analysis on documents, authors and sources using different coupling strength measures
* normalizeCitationScore: new fuction calculating NCS for documents, authors or sources using both gloabl and local citations

Changes:
* ThematicMap: added quadrant label annotations in plot
* Biblioshiny: added the "Export graph as PNG" button to network plots
* Biblioshiny: in  network plots, added the button "Edit" for editing nodes (add, change, delete)
* Biblioshiny: improvements in plot resolution and resizing
* Removed vignettes and examples Datasets to respect CRAN rules about package max size (<5Mb).
  Examples datasets are now included in a new package bibliometrixData.
  Vignettes are published on www.bibliometrix.org
* Added dependence to bibliometrixData package



bibliometrix v3.0.3 (Release date: 2020-09-25)

Changes:
* biblioshiny: Improvements in Historiograph visualization
* biblioshiny: Rewritten treemap using plotly
* biblioshiny: Removed treemap package dependence
* histPlot: Historiograsph now allows to plot document titles
* rpys: added html link to Google Scholar


bibliometrix v3.0.2 (Release date: 2020-06-17 )
==============

New functionalities:
* duplicatedMatching: added the argument "exact"
 
Changes:
* New layout for frequency plots (Biblioshiny sections: Sources, Authors and Documents)
* convert2df: Bug fixes
* biblioshiny: improved management of reactive events
* plots: removed warnings by ggplot2 package
* ThematicMap: min frequency now is a proportion


bibliometrix v3.0.1 (Release date: 2020-05-25)
==============

New functionalities:
* biblioshiny: Added "Node Degree Plot" in Conceptual, Intellectual and Social networks 
 
Changes:
* convert2df: Bug fixes when importing uncomplete metadata
* histNetwork: Bug fixes


bibliometrix v3.0.0 (Release date: 2020-04-15)
==============

New functionalities:
* bibliometrix: Now it is possible to gather data directly using 'DS Dimensions' or 'NCBI PubMed' APIs
* biblioshiny: Added "Most Local Cited Authors" analysis in Author Menu
* biblioshiny: biblioshiny() added the arguments port, host, and launch.browser 
* biblioshiny: Now it is possible to import and convert 'PubMed' and 'Cochrane Library' export files
* convert2df: Now it imports and converts json/xml collections downloaded using 'DS Dimensions' or 'NCBI PubMed' APIs
* convert2df: Now it imports and converts export files downlaoded from 'NCBI PubMed' in pubmed format
* convert2df: Now it imports and converts export files downlaoded from 'Scopus' in csv format
* convert2df: The routine to convert data from WOS, Scopus, PubMed and Cochrane plaintext and bibtex files has been completely rewritten to be extremely more accurate and faster.

Changes:
* Added dependence to dimensionsR and pubmedR packages to gather data using APIs
* Added dependence to tidyr package 
* histNetwork: the function has been completely rewritten to improve matching accuracy and speed
* biblioAnalysis: Now it returns also the number of references (nReferences)
* summary: Changed the layout of "Main Information about Data" table
* cocMatrix: Added the argument "n" to set the number of items to include in the occurrences matrix
* biblioNetwork: Added the argument "n" to set the number of items to include in the co-occurrences matrix
* networkPlot: Now it returns also the object nodeDegree
* Converting family internal functions are no longer visible to users.
* Removed the function readFiles. Its functionalities are now included in convert2df
* Removed dependence to reshape2 package
* Removed dependence to RISmed package


bibliometrix v2.3.2 (Release date: 2019-11-23)
==============

New functionality:
* biblioshiny: Introduced a new export window to export the collection into an excel/RData file
* biblioshiny: Assigned custom names to excel export buttons for all tables

bibliometrix v2.3.1 (Release date: 2019-11-01)
==============

New functionality:
* biblioshiny: added the support to Dimensions files
* convert2df(): added the support to Dimensions files
* dimensions2df(): introduced ths new function to import and convert Dimensions cvs/xlsx files


Changes:
* bug fixes in many functions




bibliometrix v2.2.2 (Release date: )
==============

New functionality:
* biblioshiny: added "remove isolated nodes" option in network analysis
* net2VOSviewer: introduced this new function to export and plot networks in VOSviewer software


Changes:
* networkPlot: Fixed an issue with "remove.isolates" argument
* networkPlot: Removed vosviewer option in "type" argument. Now networks can be exported in VOSviewer using the new function net2VOSviewer()



bibliometrix v2.2.1 (Release date: 2019-06-26)
==============

New functionality:
*conceptualStructure: Added the Benzecrì eigenvalue correction
*conceptualStructure: Added the explained variance information in the plot axis labels
*thematicEvolution: new measure "Inclusion Index weighted by Term Occurrences"
*thematicMap: Added the possibility to associate more than one label to each cluster (argument n.labels)
*thematicEvolution: Added the possibility to associate more than one label to each cluster (argument n.labels)
*biblioshiny: Integrated new functionality of conceptualStructure, thematicMap and thematicEvolution
*New dataset: management: The use of bibliometric approaches in business and management disciplines



bibliometrix v2.2.0 (Release date: 2019-05-02)
==============

New functionality:
*biblioshiny: new threeFieldsPlot in the Dataset tab
*added the function threeFieldsPlot 
*Speed improvements in several functions


bibliometrix v2.1.2 (Release date: 2019-03-14)
==============

New functionality:
*biblioshiny: new dendrogram plot in the factorial analysis (Conceptual Structure)
*biblioshiny: added the number of cluster argument in the factorial analysis (Conceptual Structure)
*biblioshiny: added Most Cited Sources (from References) in Sources
*biblioshiny: added disambiguation parameter in affiliation
*Speed improvements in several functions

Changes:
* retrievalByAuthorID: Now, even when there is an error, the function continues to download the data



bibliometrix v2.1.1 (Release date: 2019-02-07)
==============

New functionality:
* biblioshiny: all plots are now dynamic (using plot.ly or VisNetwork)
* biblioshiny: added new plots in dataset menu
* biblioshiny: Menu "Conceptual Structure" has been re-organized
* the function thematicMap has been completely rewritten. Now it automatically calculates the network and plots the map.




bibliometrix v2.1.0 (Release date: 2019-01-06)
==============

New functionality:
* biblioshiny networks are now plotted using VisNetwork package.
* biblioshiny menu has been completely rewritten. Now, descriptive analyses are organized by the unit of analysis
* Several descriptive plots and tables have been added
* Added the new function authorProdOverTime to calculate and plot the productivity over the time of the top authors
* Added "measure" parameter in plotThematicEvolution
* Added the new function bib2df. It gives the possibility to import data from a "generic" bibtex file format  (i.e. Zotero, JabRef, etc.)
* Added the possibility to calculate H-index for sources


Changes:
* Completely rewritten the importing function from bibtex files
* Solved an issue in dominance(). Now Dominance factor is correctly calculated
* Solved several issues in importing functions due to inconsistence in WOS/SCOPUS web-exporting procedures



bibliometrix v2.0.2 (Release date: 2018-10-26)
==============

New functionality:
* Added Country scientific production in descriptive analysis (biblioshiny)
* Added country collaboration map layout in biblioshiny
* Added "opacity" parameter in networkPlot
* Added "field" parameter in thematicMap
* Added "field" parameter in thematicEvolution
* Added bradford() function to identify core sources 
* Added law analyses (bradford and lotka) in biblioshiny 
* Added "stat" parameter in networkStat()
* Added "type" parameter in networkStat()
* Added Multidimensional Scaling Analysis in conceptualStructure()
* Added "shortlabel" parameter in bibloNetwork()


Changes:
* Now plots show lowercase labels
* networkStat() now allows calculating single centrality indices (using parameters stat and type)
* Improved the optimal number of clusters in conceputalStructure(). Now the wss criterium is used


bibliometrix v2.0.1 (Release date: 2018-10-09)
==============

New functionality:
* added the possibility to load Rdata files in biblioshiny()
* added Thematic Evolution to biblioshiny()
* added the function plotThematicEvolution() to draw thematic evolution
* added Thematic Map to biblioshiny()
* added TreeMap plot to biblioshiny()
* added Word Dynamic Analysis biblioshiny()
* added Source Dynamic Analysis to biblioshiny()
* added the function rpys() to perform the Reference Publication Year Spectroscopy
* added the function sourceGrowth to calculate source publication time series
* new white layout for biblioshiny()



bibliometrix v2.0.0 (Release date: 2018-09-03)
==============

New functionality:
* added biblioshiny(): A shiny app for bibliometrix R-package



bibliometrix v1.9.4 (Release date: 2018-06-24)
==============

New functionality:
* Added a new, and more readable, historiograph plot in histPlot()
* Added function networkStat() to perform the descriptive analysis of network graph characteristics
* Added the generic function summary() to summarize the results of the networkStat() function 
* Added a new section "the descriptive analysis of network graph characteristics" in the vignettes
* Added the possibility to use scopus collections in histNetwork() function
* Added the possibility, in histNetwork() function, to set the minimum number of citations for the documents included in the analysis
* Added the argument aff.disamb in metaTagExtraction()

Changes:
* Solved the compatibility issue with the new version of rscopus package
* Minor changes in argument list of histNetwork() and histPlot()
* Improved plot layout and colors in networkPlot()
* Solved the issue regarding the older versions of utils::promptPackage()
* Solved the issue regarding missing vertex labels in VOSviewer visualization 


bibliometrix v1.9.3 (Release date: 2018-05-15)
==============

New functionality:
* Added the possibility to import collections from COCHRANE Database in convert2df()
* Completely rewritten conceptualStructure() function. 
  Now it performs CA and MCA methods and plots factorial maps of documents.
* Added binary argument in cocMatrix(). It allows to build up a document x attribute matrix using both binary and full counting


bibliometrix v1.9.2 (Release date: 2018-03-28)
==============

Changes:
* Solved the issue https://stat.ethz.ch/pipermail/r-devel/2018-March/075737.html regarding the package Matrix


bibliometrix v1.9.1 (Release date: 2018-03-14)
==============

Changes:
* Minor fixes in several functions


bibliometrix v1.9 (Release date: 2018-01-20)
==============

New functionality:
* added the possibility to import collections from MedLine/PubMed in convert2df()
* added co-occurrence normalization in networkPlot()
Changes:
* improved speed and efficiency in citation analysis (histNetwork(), localCitations(), metaTagExtraction())
* improved function histNetwork()
* improved function metaTagExtraction()


bibliometrix v1.8 (Release date: 2017-08-30)
==============

Changes:
* improved historiograph algorithm in histNetwork()
* improved network layout in histPlot()
* added new SR field in the bibliographic data frame
* improved importing functions


bibliometrix v1.7 (Release date: 2017-07-07)
==============

New functionality:
* added new clustering algorithms into networkPlot()
* added argument 'halo' in networkPlot() to color cluster groups
* added function normalizeSimilarity() to calculate some probabilistic and set-theoretic similarity measures
* added function thematicMap() to create a thematic map based on co-word network analysis and clustering
* added function thematicEvolution() to create an Evolution thematic map based on co-word network analysis and clustering. 

Changes:
* removed function couplingSimilarity()

bibliometrix v1.6 (Release date: 2017-05-09)
==============

New functionality:

* added two datasets isiCollection and scopusCollection
* mergeDbSources() merges bibliographic data frames from SCOPUS and ISI WOS
* duplicatedMatching() searches duplicated records in a bibliographic database using the generalized Levenshtein (edit) distance
* dfMerge() removed from package
* removed dipendence from dplyr package
* added possibility to merge synonyms using termExtraction()
 
Changes:
* Minor fixes in several functions
* Minor corrections in vignettes and documentation


bibliometrix v1.5 (Release date: 2017-03-15)
==============

New functionality:

* retrievalByAuthorID() gets Author Content on SCOPUS by ID
* idByAuthor() gets Complete Author Information and ID from Scopus
* Hindex() introduced the argument years
 
Changes:
* Minor fixes in several functions
* Minor corrections in vignettes and documentation

bibliometrix v1.4 (Release date: 2017-01-24)
==============

New functionality:

* conceptualStructure() creates and plots conceptual structure map of a scientific field
* histPlot() plots historical co-citation network
* networkPlot() plots Bibliographic networks
* readFiles() loads a sequence of ISI or SCOPUS Export files into a large character object
 
Changes:
* Minor fixes in metaTagExtraction() function
* Minor fixes in convert2df() function
* Minor corrections in vignettes and documentation


bibliometrix v1.3 (Release date: 2016-11-17)
==============

New functionality:

* termExtraction() extracts terms from a textual field (abstract, title, author's keywords, etc.) of a bibliographic data frame. 
Now it integrates Porter's stemming algorithm and term extraction procedure for English, French, German, Italian and Spanish textual contents.


bibliometrix v1.2 (Release date: 2016-10-18)
==============

New functionality:
* keywordAssoc() associates authors' keywords to keywords plus
* keywordGrowth() calculates yearly cumulative occurrences of top keywords.
* termExtraction() extracts terms from a textual field (abstract, title, author's keywords, etc.) of a bibliographic data frame.

Changes:
* New statistics in summary() function
* Minor fixes in convert2df() function
* Minor corrections in vignettes and documentation


bibliometrix v1.1 (Release date: 2016-09-07)
==============

Changes:
* Minor fixes in convert2df() function
* Minor corrections in vignettes and documentation


bibliometrix v1.0 (Release date: 2016-06-28)
==============

New functionality:
* histNetwork() creates a historical co-citation network from a bibliographic data frame.

Changes:
* Minor fixes in cocMatrix() function
* Minor corrections in vignettes and documentation


bibliometrix v0.8 (Release date: 2016-06-10)
==============

New functionality:
* Hindex() calculates the authors' h-index and its variants (g-index, m-index) in a a bibliographic collection.

New data:
* garfield dataset

Changes:
* Minor corrections in vignettes and documentation


bibliometrix v0.7 (Release date: 2016-06-04)
==============

New functionality:
* timeslice() calculates Jaccard and Salton similarity indices among manuscripts of a coupling network
* dfMerge() merges two bibliographic data frames deleting duplicate manuscripts.
* metaTagExtraction() now extracts also university of affiliation for each co-author

Changes:
* Minor fixes in metaTagExtraction() function 
* Minor corrections in vignettes and documentation


bibliometrix v0.6 (Release date: 2016-05-30)
==============

New functionality:
* couplingSimilarity() calculates Jaccard and Salton similarity indices among manuscripts of a coupling network

Changes:
* Minor corrections in vignettes and documentation


bibliometrix v0.5 (Release date: 2016-05-25)
==============

New functionality:
* localCitations() generates the frequency table of the most cited local authors.

Changes:
* Minor fixes in citations() function
* Minor corrections in vignettes and documentation


bibliometrix v0.4 (Release date: 2016-05-23)
==============

Changes:
* Minor fixes in citations() function


bibliometrix v0.3 (Release date: 2016-05-21)
==============

Changes:
* Minor corrections in vignettes and documentation


bibliometrix v0.2 (Release date: 2016-05-19)
==============

Changes:
* Additional vignettes and documentation

New functionality:
* citations() generates the frequency table of the most cited references or the most cited first authors (of references).
* lotka() now performs Kolmogorov-Smirnoff two-sample test among observed and theoretical Lotka's distributions.

Bug Fixes:
* Minor fixes in importing routines and summary function.