J. Gao, W. Yuan, X. Li, K. Deng, and J. Nie. Proceedings of the 32Nd International ACM SIGIR Conference on Research and Development in Information Retrieval, page 355--362. New York, NY, USA, ACM, (2009)
B. Piwowarski, G. Dupret, and R. Jones. Proceedings of the Second ACM International Conference on Web Search and Data Mining, page 162--171. New York, NY, USA, ACM, (2009)
R. Nagmoti, A. Teredesai, and M. De Cock. Proceedings of the 2010 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology - Volume 01, page 153--157. Washington, DC, USA, IEEE Computer Society, (2010)
M. Bouadjenek, H. Hacid, and M. Bouzeghoub. Proceedings of the 36th International ACM SIGIR Conference on Research and Development in Information Retrieval, page 861--864. New York, NY, USA, ACM, (2013)