J. Savoy, and E. Gaussier. Handbook of Natural Language Processing, Second Edition, CRC Press, Taylor and Francis Group, Boca Raton, FL, ISBN 978-1420085921.(2010)
Y. Sasaki, and Y. Matsuo. Proceedings of the 18th conference on Computational linguistics, page 698--704. Morristown, NJ, USA, Association for Computational Linguistics, (2000)
A. Sarkar, and W. Tripasai. Proceedings of the 19th international conference on Computational
linguistics, page 1--7. Morristown, NJ, USA, Association for Computational Linguistics, (2002)
H. Nanba, A. Fujii, M. Iwayama, and T. Hashimoto. PaIR '08: Proceeding of the 1st ACM workshop on Patent information
retrieval, page 25--32. New York, NY, USA, ACM, (2008)
D. Milward, and J. Thomas. ACL-2000 Workshop on Recent Advances in Natural Language Processing
and Information Retrieval, page 85--97. Hong Kong, China, Association for Computational Linguistics, (October 2000)
M. de Marneffe, B. MacCartney, and C. Manning. Proceedings of the IEEE / ACL 2006 Workshop on Spoken Language Technology, The Stanford Natural Language Processing Group, (2006)