1. Aronson, E., Blaney, N., Sikes, J., Stephan, G., Snapp, M.: The Jigsaw Classroom. Sage Publication, Beverly Hills (1978)
2. BetBeder, M.L., Tchounikine, P.: Symba: a framework to support collective activities in an educational context. In: Lee, K., Mitchell, K. (eds.) Proc. of the International Conference on Computers in Education, pp. 188–196. AACE, Hong-Kong (2003)
3. De Chiara, R., Di Matteo, A., Manno, I., Scarano, V.: Coffee: Cooperative face2face educational environment. In: Proceedings of the 3rd International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2007), New York, USA, November 12-15 (2007)
4. De Chiara, R., Manno, I., Scarano, V.: Design issues for a co-located collaborative learning system. In: EARLI 2007 Book of Abstracts, in the Computer support for face-to-face collaborative problem solving Symposia (in press, 2007)
5. Dillenbourg, P.: Over-scripting CSCL: The risks of blending collaborative learning with instructional design, pp. 61???91 (2002);