R. Jäschke, A. Hotho, F. Mitzlaff, and G. Stumme. Recommender Systems for the Social Web, volume 32 of Intelligent Systems Reference Library, Springer, Berlin/Heidelberg, (2012)
D. Millen, J. Feinberg, and B. Kerr. Proceedings of the SIGCHI conference on Human Factors in computing systems, page 111--120. New York, NY, USA, ACM, (2006)
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)
R. Keller, S. Wolfe, J. Chen, J. Rabinowitz, and N. Mathe. Selected papers from the sixth international conference on World Wide Web, page 1103--1114. Essex, UK, Elsevier Science Publishers Ltd., (1997)
P. Heymann, G. Koutrika, and H. Garcia-Molina. Proceedings of the 2008 International Conference on Web Search and Data Mining, page 195--206. New York, NY, USA, ACM, (2008)
M. Noll, and C. Meinel. Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference, page 367--380. Berlin, Heidelberg, Springer-Verlag, (2007)