J. Gemmell, A. Shepitsen, M. Mobasher, und R. Burke. Proceedings of the 6th Workshop on Intelligent Techniques for Web Personalization and Recommender Systems, (Juli 2008)
H. Kim, S. Scerri, J. Breslin, S. Decker, und H. Kim. Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications, Seite 128--137. Berlin, Deutschland, Dublin Core Metadata Initiative, (2008)