A. Al-Maskari, M. Sanderson, and P. Clough. Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 773--774. New York, NY, USA, ACM, (2007)
B. Carterette, J. Allan, and R. Sitaraman. SIGIR '06: Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, page 268--275. New York, NY, USA, ACM, (2006)
E. Jensen, S. Beitzel, O. Frieder, and A. Chowdhury. Special interest tracks and posters of the 14th international conference on World Wide Web, page 1176--1177. New York, NY, USA, ACM, (2005)
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)
A. Kittur, E. Chi, and B. Suh. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 453--456. New York, NY, USA, ACM, (2008)