S. Whittaker, L. Terveen, W. Hill, and L. Cherny. From Usenet to CoWebs - Interacting with Social Information Spaces, Springer, London, Computer-Supported Cooperative Work.(2003)
A. Larsson. GROUP '03: Proceedings of the 2003 international ACM SIGGROUP conference on Supporting group work, page 153-160. New York, NY, USA, ACM Press, (2003)
M. Riedl, and R. Amant. AAMAS '03: Proceedings of the second international joint conference on Autonomous agents and multiagent systems, page 361--368. New York, NY, USA, ACM Press, (2003)