VOSviewer 1.6.9 (http://www.vosviewer.com)

Copyright (c) 2009-2018 Nees Jan van Eck and Ludo Waltman

It is permitted, free of charge, to use and/or distribute this
software, provided that the above copyright notice and this permission
notice are retained. It is not permitted to modify this software.

======================================================================

VOSviewer uses the following libraries:
* Apache HttpComponents
  (https://hc.apache.org)
* Apache OpenNLP 1.5.3
  (http://opennlp.apache.org)
* FreeHEP VectorGraphics 2.3
  (http://freehep.github.io/freehep-vectorgraphics/)
* JAI ImageIO Core 1.3.1
  (https://github.com/jai-imageio/jai-imageio-core)
* Jarvis-Commons 0.2.1
  (http://code.google.com/p/jarvis-commons/)
* JBusyComponent 1.2.2
  (http://code.google.com/p/jbusycomponent/)
* JSON in Java 20140107
  (http://json.org)
* JXLayer 3.0.4
  (http://java.net/projects/jxlayer/)
* juniversalchardet 2.0.0
  (https://github.com/albfernandez/juniversalchardet)
* Radiance Substance 0.9
  (https://github.com/kirill-grouchnikov/radiance)
* SwingX 1.6.5
  (http://swinglabs.org)
* Unirest 1.4.9
  (http://unirest.io/java.html)
For copyright, license, and disclaimer information for each of these
libraries, we refer to the above listed web addresses.