A. Majchrzak, C. Wagner, and D. Yates. WikiSym '06: Proceedings of the 2006 international symposium on Wikis, page 99--104. New York, NY, USA, ACM, (2006)
D. Millen, J. Feinberg, and B. Kerr. CHI '06: Proceedings of the SIGCHI conference on Human Factors in computing systems, page 111--120. New York, NY, USA, ACM, (2006)