Steven M. Beitzel, Eric C. Jensen, Abdur Chowdhury, Ophir Frieder. Varying approaches to topical web query classification. In Wessel Kraaij, Arjen P. de Vries, Charles L. A. Clarke, Norbert Fuhr, Noriko Kando, editors, SIGIR 2007: Proceedings of the 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, Amsterdam, The Netherlands, July 23-27, 2007. pages 783-784, ACM, 2007. [doi]