E. Voorhees. Proceedings of the 16th annual international ACM SIGIR conference on Research and development in information retrieval, page 171--180. New York, NY, USA, ACM, (1993)
C. Wang, J. Han, Y. Jia, J. Tang, D. Zhang, Y. Yu, and J. Guo. Proceedings of the 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 203--212. New York, NY, USA, ACM, (2010)
Y. Yang, and X. Liu. SIGIR '99: Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval, page 42--49. New York, NY, USA, ACM Press, (1999)
M. Zhang, J. Zhang, J. Su, and G. Zhou. Proceedings of the 21st International Conference on Computational Linguistics and the 44th annual meeting of the Association for Computational Linguistics, page 825--832. Stroudsburg, PA, USA, Association for Computational Linguistics, (2006)