B. Yu, und M. Singh. Cooperative Information Agents IV - The Future of Information Agents in Cyberspace, Volume 1860 von Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2000)
F. Mitzlaff, D. Benz, G. Stumme, und A. Hotho. HT '10: Proceedings of the 21st ACM Conference on Hypertext and Hypermedia, Seite 265--270. New York, NY, USA, ACM, (2010)