References

Eck, Nees Jan Van, and Ludo Waltman. 2007. “VOS: A New Method for Visualizing Similarities Between Objects.” Studies in Classification, Data Analysis, and Knowledge Organization, 299–306. https://doi.org/10.1007/978-3-540-70981-7_34/COVER.

Eck, Nees Jan van, and Ludo Waltman. 2010. “Software Survey: VOSviewer, a Computer Program for Bibliometric Mapping.” Scientometrics 84 (August): 523–38. https://doi.org/10.1007/s11192-009-0146-3.