In: Liliana Ardissono; Paul Brna; Antonija Mitrovic (Hrsg.). Proceedings of the User Modeling Conference 2005, Doctoral Consortium. International Conference on User Modeling (UM-05), July 24-29, Edinburgh, United Kingdom, Pages 506-508, Lecture Notes in Computer Science (LNCS), Vol. 3538, ISBN 3-540-27885-0, Springer, Berlin, 2005.