F. Shipman, III, C. Marshall, und M. LeMere. Proceedings of the tenth ACM Conference on Hypertext and hypermedia : returning to our diverse roots: returning to our diverse roots, Seite 121--130. New York, NY, USA, ACM, (1999)
M. Kitsuregawa, T. Tamura, M. Toyoda, und N. Kaji. Progress in WWW Research and Development, Volume 4976 von Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2008)
A. Brew, D. Greene, und P. Cunningham. Proceedings of the 19th European Conference on Artificial Intelligence, Volume 215 von Frontiers in Artificial Intelligence and Applications, Seite 145--150. Amsterdam, The Netherlands, The Netherlands, IOS Press, (2010)