A. Shepitsen, J. Gemmell, B. Mobasher, und R. Burke. RecSys '08: Proceedings of the 2008 ACM conference on Recommender systems, Seite 259--266. New York, NY, USA, ACM, (2008)
M. Haridas, und D. Caragea. On the Move to Meaningful Internet Systems: OTM 2009, Volume 5871 von Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2009)
