M. Barros and M. Verdejo, Analysing student interaction processes in order to improve collaboration. The DEGREE approach, Int. J. of Art. Int. in Education, vol.11, pp.221-241, 2000.

R. Bentley, W. Appelt, . U. Busbach, E. Hinrichs, D. Kerr et al., Basic support for cooperative work on the World Wide Web, International Journal of Human-Computer Studies, vol.46, issue.6, pp.827-846, 1997.
DOI : 10.1006/ijhc.1996.0108

H. Cho, M. Stefanone, and G. Gay, Social information sharing in a CSCL community, Proceedings of the Conference on Computer Support for Collaborative Learning Foundations for a CSCL Community, CSCL '02, pp.43-50, 2002.
DOI : 10.3115/1658616.1658623

C. Collazos, L. Guerrero, J. Pino, and S. Ochoa, Evaluating Collaborative Learning Processes, Proc. of the 8th Int. Workshop on Groupware, pp.203-221, 2002.
DOI : 10.1007/3-540-46124-8_14
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.416.6721

T. Daradoumis, M. Guitert, F. Giménez, J. M. Marquès, and T. Lloret, Supporting the composition of effective virtual groups for collaborative learning, International Conference on Computers in Education, 2002. Proceedings., pp.332-336, 2002.
DOI : 10.1109/CIE.2002.1185939

T. Daradoumis, F. Xhafa, and J. M. Marquès, Evaluating Collaborative Learning Practices in a Virtual Groupware Environment, Proc. of the Int. Conf. on Computers and Advanced Technology in Education, pp.438-443, 2003.

T. Daradoumis, F. Xhafa, and J. M. Marquès, Exploring Interaction Behaviour and Performance of Online Collaborative Learning Teams, Proc. of the 9th Int. Workshop on Groupware, pp.203-221, 2003.
DOI : 10.1007/978-3-540-39850-9_11

P. Dillenbourg, Collaborative Learning. Cognitive and Computational Approaches, pp.1-19, 1999.
URL : https://hal.archives-ouvertes.fr/hal-00190699

J. Frechtling and L. Sharp, User-Friendly Handbook for Mixed Evaluations. Directorate for Education and Human Resources Division of Research, Evaluation and Communication, 1997.

J. Macdonald, Assessing online collaborative learning: process and product, Computers & Education, vol.40, issue.4, pp.40-377, 2003.
DOI : 10.1016/S0360-1315(02)00168-9
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.84.6688

J. E. Mcgrath, Time, Interaction, and Performance (TIP): A Theory of Groups, Small Group Research, vol.22, issue.2, pp.147-174, 1991.
DOI : 10.1177/1046496491222001

A. Martínez, Y. Dimitriadis, B. Rubia, E. Gómez, and P. De-la-fuente, Combining qualitative evaluation and social network analysis for the study of classroom social interactions, Computers & Education, vol.41, issue.4, pp.353-368, 2003.
DOI : 10.1016/j.compedu.2003.06.001

M. Mühlenbrock, Action-based collaboration analysis for group learning, 2001.

A. Sfard, On Two Metaphors for Learning and the Dangers of Choosing Just One, Educational Researcher, vol.27, issue.2, pp.4-13, 1998.
DOI : 10.3102/0013189X027002004

A. Soller, Supporting Social Interaction in an Intelligent Collaborative Learning System, Int. J. of Artificial Intelligence in Education, vol.12, pp.40-62, 2001.
URL : https://hal.archives-ouvertes.fr/hal-00197321

S. Wasserman and K. Faust, Social Network Analysis: Methods and Applications, 1994.
DOI : 10.1017/CBO9780511815478

N. Webb, Testing a theoretical model of student interaction and learning in small groups Interaction in Cooperative Groups: The Theoretical Anatomy of Group Learning, pp.102-119, 1992.

D. W. Wortham, Nodal and matrix analyses of communication patterns in small groups, Proceedings of the 1999 conference on Computer support for collaborative learning, CSCL '99, pp.681-686, 1999.
DOI : 10.3115/1150240.1150322

J. Zumbach, M. Mühlenbrock, M. Jansen, P. Reimann, and H. U. Hoppe, Multidimensional Tracking in Virtual Learning Teams, Computer Support for Collaborative Learning: Foundations for a CSCL community. Erlbaum, Hillsdale, pp.650-651, 2000.