I. Kang, and G. Kim. SIGIR '03: Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval, page 64--71. New York, NY, USA, ACM, (2003)
A. Moschitti. EACL 2006, 11st Conference of the European Chapter of the Association for Computational Linguistics, Proceedings of the Conference, April 3-7, 2006, Trento, Italy, The Association for Computer Linguistics, (2006)
P. Turney. ACL '02: Proceedings of the 40th Annual Meeting on Association for Computational Linguistics, page 417--424. Morristown, NJ, USA, Association for Computational Linguistics, (2001)
J. Allan, and H. Raghavan. Proceedings of the 25th annual international ACM SIGIR Conference on Research and Development in Information Retrieval, page 307--314. ACM Press New York, NY, USA, (2002)