Wolfgang Nejdl Judy Kay Pearl Pu Eelco Herder Adaptive Hypermedia and Adaptive Web-Based Systems, 5th International Conference, AH 2008, Hannover, Germany, July 29 - August 1, 2008. Proceedings 5149 2008 978-3-540-70984-8 AH Lecture Notes in Computer Science Springer db/conf/ah/ah2008.html