1. Brusilovsky, P.: KnowledgeTree: A Distributed Architecture for Adaptive E-Learning. In: Proc. of the 13th Int. World Wide Web Conf., WWW 2004, pp. 104–113. ACM Press, New York (2004)
2. Lecture Notes in Computer Science;M. Meccawy,2008
3. SCI;P. Bra De,2007
4. Cristea, A.I., De Mooij, A.: LAOS: Layered WWW AHS Authoring Model and their corresponding Algebraic Operators. In: Proc. of the 12th Int. World Wide Web Conf., WWW 2003, Budapest, Hungary. ACM, New York (2003)
5. Sosnovsky, S., Brusilovsky, P., Yudelson, M.: Supporting Adaptive Hypermedia Authors with Automated Content Indexing. In: 2nd Int. Workshop on Authoring of Adaptive and Adaptable Educational Hypermedia at AH 2004, pp. 23–26 (2004)