X. Li, and W. Croft. CIKM '06: Proceedings of the 15th ACM international conference on Information and knowledge management, page 238--247. New York, NY, USA, ACM, (2006)
X. Li, and W. Croft. CIKM '06: Proceedings of the 15th ACM international conference on Information and knowledge management, page 238--247. New York, NY, USA, ACM, (2006)
X. Li, and B. Croft. CIKM '06: Proceedings of the 15th ACM international conference on Information and knowledge management, page 238--247. New York, NY, USA, ACM Press, (2006)