R. Cooley, B. Mobasher, und J. Srivastava. Proceedings of the Ninth IEEE International Conference on Tools with Artificial Intelligence (ICTAI'97), IEEE Computer Society, (November 1997)
J. Aslam, E. Yilmaz, und V. Pavlu. SIGIR '05: Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval, Seite 27--34. New York, NY, USA, ACM Press, (2005)
F. Suchanek, G. Ifrim, und G. Weikum. Proceedings of the 2nd Workshop on Ontology Learning and Population: Bridging the Gap between Text and Knowledge, Seite 18--25. Sydney, Australia, Association for Computational Linguistics, (Juli 2006)