X. Wu, L. Zhang, and Y. Yu. WWW '06: Proceedings of the 15th international conference on World Wide Web, page 417-426. New York, NY, USA, ACM Press, (2006)
H. Wu, M. Zubair, and K. Maly. HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, page 111--114. New York, NY, USA, ACM Press, (2006)
F. Fuchs-Kittowski, and A. Kohler. WikiSym '05: Proceedings of the 2005 international symposium on Wikis, page 33--39. New York, NY, USA, ACM Press, (2005)