B. Adler, and L. de Alfaro. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 261--270. New York, NY, USA, ACM Press, (2007)
G. Brajnik, S. Mizzaro, and C. Tasso. SIGIR '96: Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval, page 128--136. New York, NY, USA, ACM, (1996)
K. Järvelin. Proceedings of the 2nd International Conference on the Theory of Information Retrieval. Lecture Notes in Computer Science, 5766, page 289-296. Heidelberg, Springer, (2009)
S. Middleton, D. Roure, and N. Shadbolt. K-CAP '01: Proceedings of the 1st international conference on Knowledge capture, page 100--107. New York, NY, USA, ACM Press, (2001)