Schafer, J. Ben ; Frankowski, Dan ; Herlocker, Jon ; Sen, Shilad ; Brusilovsky, Peter (Bearb.) ; Kobsa, Alfred (Bearb.) ; Nejdl, Wolfgang (Bearb.): Collaborative Filtering Recommender Systems In: The Adaptive Web: Methods and Strategies of Web Personalization. 4321. Berlin, Heidelberg : Springer, 2007 Lecture Notes in Computer Science). - ISBN-978-3-540-72078-2, S. 291-324