X. Jin, Y. Zhou, and B. Mobasher. KDD '04: Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining, page 197--205. New York, NY, USA, ACM, (2004)
X. Phan, L. Nguyen, and S. Horiguchi. WWW '08: Proceeding of the 17th international conference on World Wide Web, page 91--100. New York, NY, USA, ACM, (2008)
H. Ma, H. Yang, I. King, and M. Lyu. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge mining, page 709--718. New York, NY, USA, ACM, (2008)
K. He, Y. Chang, and W. Lu. WI '07: Proceedings of the IEEE/WIC/ACM International Conference on Web Intelligence, page 683--686. Washington, DC, USA, IEEE Computer Society, (2007)