VOSviewer has been developed by Nees Jan van Eck and Ludo Waltman at Leiden University's Centre for Science and Technology Studies (CWTS). If you have any questions or comments regarding VOSviewer, please use the form below to contact the developers.

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Nees Jan van Eck


Ludo Waltman

Nees Jan van Eck and Ludo Waltman are working as researchers at the Centre for Science and Technology Studies (CWTS) of Leiden University in the Netherlands. Their research focuses on the analysis and visualization of bibliometric networks and aims to contribute to an improved understanding of the structure and dynamics of science.

In addition to VOSviewer, Nees Jan and Ludo have also developed CitNetExplorer. CitNetExplorer is a software tool for visualizing and analyzing citation networks of scientific publications.

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