T. Ishikawa, P. Klaisubun, M. Honma, and Z. Qian. WI-IATW '06: Proceedings of the 2006 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology (WI-IAT 2006 Workshops)(WI-IATW'06), page 192--195. Washington, DC, USA, IEEE Computer Society, (2006)
A. Shepitsen, J. Gemmell, B. Mobasher, and R. Burke. RecSys '08: Proceedings of the 2008 ACM conference on Recommender systems, page 259--266. New York, NY, USA, ACM, (2008)
M. de Gemmis, P. Lops, G. Semeraro, and P. Basile. RecSys '08: Proceedings of the 2008 ACM conference on Recommender systems, page 163--170. New York, NY, USA, ACM, (2008)
G. Groh, and C. Ehmig. GROUP '07: Proceedings of the 2007 international ACM conference on Supporting group work, page 127--136. New York, NY, USA, ACM, (2007)