J. Gemmell, T. Schimoler, B. Mobasher, und R. Burke. Proceedings of the 19th ACM international conference on Information and knowledge management, Seite 829--838. New York, NY, USA, ACM, (2010)
P. Melville, R. Mooney, und R. Nagarajan. Eighteenth National Conference on Artificial Intelligence, Seite 187--192. Menlo Park, CA, USA, American Association for Artificial Intelligence, (2002)
R. Wetzker, W. Umbrath, und A. Said. ESAIR '09: Proceedings of the WSDM '09 Workshop on Exploiting Semantic Annotations in Information Retrieval, Seite 25--29. New York, NY, USA, ACM, (2009)