Adaptive Hypermedia and Adaptive Web-Based Systems International Conference, AH 2000, Trento, Italy, August 28-30, 2000 Proceedings - Brusilovsky, Peter; Brusilovsky, Peter; Stock, Oliviero; Stock, Oliviero; Strapparava, Carlo; Strapparava, Carlo (Springer Berlin Heidelberg : Imprint: Springer, 2000)