C. Ziegler, S. McNee, J. Konstan, and G. Lausen. Proceedings of the 14th international conference on World Wide Web, page 22-32. New York, NY, USA, ACM, (2005)
Y. Zhang, J. Callan, and T. Minka. Proceedings of the 25th international ACM SIGIR conference on Research
and development in information retrieval, page 81-88. New York, NY, USA, ACM, (2002)
L. Weng, Y. Xu, Y. Li, and R. Nayak. Proceedings of the IEEE/WIC/ACM International Conferences on
Web Intelligence and Intelligent Agent Technology, page 115-118. Washington, DC, USA, IEEE Computer Society, (2007)
S. Pauws, W. Verhaegh, and M. Vossen. Proceedings of 7th International Conference on Music Information
Retrieval, page 138-143. Victoria, Canada, (2006)