N. Agarwal, H. Liu, L. Tang, und P. Yu. WSDM '08: Proceedings of the international conference on Web search and web data mining, Seite 207-218. New York, NY, USA, ACM, (2008)
N. Aizenbud-Reshef, I. Guy, und M. Jacovi. GROUP '09: Proceedings of the ACM 2009 international conference on Supporting group work, Seite 277--280. New York, NY, USA, ACM, (2009)
N. Anderson, und C. Lin. ITiCSE '09: Proceedings of the 14th annual ACM SIGCSE conference on Innovation and technology in computer science education, Seite 243--247. New York, NY, USA, ACM, (2009)
A. Andreevskaia, S. Bergler, und M. Urseanu. International Conference on Weblogs and Social Media, Hilton Seattle Downtown, Seattle, Washington, U.S.A., (März 2007)