&. Meagher, Vassileva Supporting Peer Help and Collaboration in Distributed Supporting Peer Help and Collaboration in Distributed Workplace Environments, International Journal of Artificial Intelligence in Education, vol.9, pp.159-177, 1998.

P. Northrup, A Framework for Designing Interactivity into Web-based Instruction, Educational Technology, vol.41, issue.2, pp.31-39, 2001.

K. Kreijns, P. A. Kirschner, and &. , Jochems The Sociability of Computer-Supported Collaborative Learning Environments, Educational Technology & Society, vol.5, issue.1, pp.822-837, 2002.