I. Huvila, and K. Johannesson. Information Science and Social Media : Proceedings of the International Conference Information Science and Social Media ISSOME 2011, August 24-26, Åbo/Turku, Finland, volume 1 of Skrifter utgivna av Informationsvetenskap vid Åbo Akademi, page 99--106. Åbo Akademi, (2011)
C. Trabelsi, A. Jrad, and S. Yahia. Proceedings of the 2010 IEEE International Conference on Data Mining Workshops, page 369--379. Washington, DC, USA, IEEE Computer Society, (2010)
M. Grahl, A. Hotho, and G. Stumme. 7th International Conference on Knowledge Management (I-KNOW '07), page 356-364. Graz, Austria, Know-Center, (September 2007)
R. Jäschke, B. Krause, A. Hotho, and G. Stumme. Proceedings of the Second International Conference on Weblogs and Social Media(ICWSM 2008), AAAI Press, (2008)
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)