M. Ekstrand, and J. Riedl. Proceedings of the 5th International Symposium on Wikis and Open Collaboration, page 4:1--4:10. New York, NY, USA, ACM, (2009)
A. Kittur, B. Suh, and E. Chi. Proceedings of the 2008 ACM conference on Computer supported cooperative work, page 477--480. New York, NY, USA, ACM, (2008)
B. Suh, G. Convertino, E. Chi, and P. Pirolli. WikiSym '09: Proceedings of the 5th International Symposium on Wikis and Open Collaboration, page 1--10. New York, NY, USA, ACM, (2009)
U. Brandes, P. Kenis, J. Lerner, and D. van Raaij. WWW '09: Proceedings of the 18th international conference on World wide web, page 731--740. New York, NY, USA, ACM, (2009)