L. Cai, и T. Hofmann. Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR '03), July 28 - August 1, 2003, Toronto, Canada, стр. 182--189. ACM Press, New York, NY, USA, (2003)
T. Hofmann. Proceedings of the 22nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR '99), August 15-19, 1999, Berkeley, CA, USA, стр. 50--57. ACM Press, New York, NY, USA, (1999)
R. Wetzker, W. Umbrath, и A. Said. ESAIR '09: Proceedings of the WSDM '09 Workshop on Exploiting Semantic Annotations in Information Retrieval, стр. 25--29. New York, NY, USA, ACM, (2009)
T. Hofmann. SIGIR '99: Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval, стр. 50--57. New York, NY, USA, ACM, (1999)
M. Girolami, и A. Kabán. Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval, стр. 433--434. ACM, (2003)