Peter Brusilovsky Carlo Tasso Preface to Special Issue on User Modeling for Web Information Retrieval. 147-157 2004 14 User Model. User-Adapt. Interact. 2-3 http://dx.doi.org/10.1023/B:USER.0000029016.80122.dd db/journals/umuai/umuai14.html#BrusilovskyT04