R. Fish, R. Kraut, und M. Leland. Proceedings of the ACM SIGOIS and IEEECS TC-OA 1988 conference on Office information systems, Seite 30--37. New York, NY, USA, ACM Press, (1988)
D. Li, und R. Li. CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, Seite 457-466. New York, NY, USA, ACM Press, (2004)
C. Ignat, und M. Norrie. CSCW '04: Proceedings of the 2004 ACM conference on Computer supported cooperative work, Seite 447-456. New York, NY, USA, ACM Press, (2004)