5Vivekanandan Suresh Kumar, Computer -Supported Collaborative Learning: Issues for Research, 1993,1994, Nikos Drakos, Computer Based learning Unit, University of Leeds.
6Aronson, E, Blaney, N. , Stephan, C. ,Sikes, J. & Snapp, M. (1978) . The Jigsaw Classroom. Beverly Hills. CA: Sage Publications.
7Cooperative Learning. San Clemente, CA:Ksgan Cooperative Learning(1996).
8David Kitchen, Douglas Mcdougall, University of Toronto, Collaborative Learning on The Internet, J Educational. Technology Systems, Vol. 27(3)PP245 - 258, 1998 - 99.
