G. Feng, T. Liu, Y. Wang, Y. Bao, Z. Ma, X. Zhang, and W. Ma. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR \textquotesingle06, ACM Press, (2006)
S. Feng, X. Li, Y. Zeng, G. Cong, Y. Chee, and Q. Yuan. Proceedings of the 24th International Conference on Artificial Intelligence, page 2069--2075. AAAI Press, (2015)
Z. Cao, T. Qin, T. Liu, M. Tsai, and H. Li. Proceedings of the 24th international conference on Machine learning, page 129--136. New York, NY, USA, ACM, (2007)
J. Feng, Q. Fang, and W. Ng. SIGMOD '08: Proceedings of the 2008 ACM SIGMOD international conference on Management of data, page 55--66. New York, NY, USA, ACM, (2008)
Z. Cao, T. Qin, T. Liu, M. Tsai, and H. Li. ICML '07: Proceedings of the 24th international conference on Machine learning, page 129--136. New York, NY, USA, ACM, (2007)