G. Feng, T. Liu, Y. Wang, Y. Bao, Z. Ma, X. Zhang, и W. Ma. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR \textquotesingle06, ACM Press, (2006)
F. Xia, T. Liu, J. Wang, W. Zhang, и H. Li. Proceedings of the 25th international conference on Machine learning, стр. 1192--1199. New York, NY, USA, ACM, (2008)
L. Zhang, Q. Liu, J. Zhang, H. Wang, Y. Pan, и Y. Yu. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, том 4825 из LNCS, стр. 645--658. Berlin, Heidelberg, Springer Verlag, (ноября 2007)
Z. Nie, Y. Zhang, J. Wen, и W. Ma. WWW '05: Proceedings of the 14th international conference on World Wide Web, стр. 567--574. New York, NY, USA, ACM Press, (2005)