D. Millen, und M. Fontaine. GROUP '03: Proceedings of the 2003 international ACM SIGGROUP conference on Supporting group work, Seite 205--211. New York, NY, USA, ACM, (2003)
A. Blanchard, und M. Markus. Communities and Technologies 2007: Proceedings of the Third Communities and Technologies Conference, Seite 323-350. London, Springer, (2007)