F. Abel, I. Bittencourt, N. Henze, D. Krause, und J. Vassileva. Adaptive Hypermedia and Adaptive Web-Based Systems, 5th
International Conference, AH 2008, Hannover, Germany, July
29 - August 1, 2008. Proceedings, Volume 5149 von Lecture Notes in Computer Science, Seite 12-21. Springer, (2008)
F. Abel, N. Henze, und D. Krause. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge mining, Seite 1429--1430. New York, NY, USA, ACM, (2008)