1. Bannon, L. & Kuutti, K. (1993), Searching for Unity Among Diversity: Exploring the “Interface” Concept, in S. Ashlund, K. Mullet, A. Henderson, E. Hollnagel & T. White (eds.), Proceedings of INTERCHI’93, ACM Press/IOS Press, pp.263–8.
2. B0dker, S. (1991), Through the Interface: A Human Activity Approach to User Interface Design, Lawrence Erlbaum Associates.
3. 2753;G Bourguin,2000
4. Bourguin, G. & Derycke, A. (2000), A Reflective CSCL Environment with Foundations Based on the Activity Theory, in G. Gauthier, C. Frasson & K. van Lehn (eds.), Proceedings of ITS’2000, Fifth International Conference on Intelligent Tutoring Systems,, number 1839 in “Lecture Notes in Computer Science”, pp.272–81.
5. Bourguin, G. & Derycke, A. (2001), Integrating the CSCL Activities into Virtual Campuses: Foundations of a new Infrastructure for Distributed Collective Activities, in P. Dillenbourg, A. Eurelings & K. Hakkarainen (eds.), Proceedings of Euro-CSCL 2001, Fifth European Perspectives on Computer-supported Collaborative Learning, McLuhan Institute, pp. 123–30.