M. Specht, M. Kravcik, R. Klemke, L. Pesin, and R. Hüttenhain. Adaptive Hypermedia and Adaptive Web-Based Systems, Second International
Conference, AH 2002, Malaga, Spain, May 29-31, 2002, Proceedings, volume 2347 of Lecture Notes in Computer Science, page 572-575. Springer, (2002)
K. Reinhardt, S. Apelt, and M. Specht. Adaptive Hypermedia and Adaptive Web-Based Systems: Third International
Conference, AH 2004, Eindhoven, The Netherlands, August 23-26, 2004, (2004)