R. Yan, J. Tang, X. Liu, D. Shan, and X. Li. Proceedings of the 20th ACM international conference on Information and knowledge management, page 1247--1252. New York, NY, USA, ACM, (2011)
R. Yan, J. Tang, X. Liu, D. Shan, and X. Li. Proceedings of the 20th ACM international conference on Information and knowledge management, page 1247--1252. New York, NY, USA, ACM, (2011)