S. Chakrabarti, M. Joshi, K. Punera, and D. Pennock. WWW '02: Proceedings of the 11th international conference on World Wide Web, page 251--262. New York, NY, USA, ACM Press, (2002)
A. Vercoustre, J. Pehcevski, and J. Thom. Pre-proceedings of the sixth International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2007), (2007)
J. Kazama, and K. Torisawa. Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, page 698--707. (2007)