$. Phxu-(-dufort, H. Leibu, and C. Frasson, Some justifications for the learning by disturbing strategy, Proceedings of the 8th World Conference on Artificial Intelligence in Education (AI-ED 97), pp.119-126, 1997.

M. Baker and K. Lund, Flexibly structuring the interaction in a CSCL environment, Proceedings of the European Conference on Artificial Intelligence in Education (EuroAIED '96), pp.401-407, 1996.

I. Blackboard, Blackboard CourseInfo ? 4.0 Product Overview, 1999.

P. Blumenfeld, R. Marx, E. Soloway, and J. Krajcik, Learning With Peers: From Small Group Cooperation to Collaborative Communities, Educational Researcher, vol.25, issue.8, pp.2537-2577, 1996.
DOI : 10.3102/0013189X025008037

A. Brown and A. Palincsar, Guided, cooperative learning and individual knowledge acquisition, Knowledge, learning and instruction, pp.307-336, 1989.

A. Bruckman and A. Bonte, MOOSE goes to school, Proceedings of the 2nd international conference on Computer support for collaborative learning, CSCL '97, pp.20-26, 1997.
DOI : 10.3115/1599773.1599776

S. Bull and E. Broady, Spontaneous peer tutoring from sharing student models, Proceedings of the 8th World Conference on Artificial Intelligence in Education (AI-ED 97), pp.143-150, 1997.

M. Burton, Computer modelling of dialogue roles in collaborative learning activities. Unpublished doctoral dissertation, 1998.

J. Cahn and . Brennan, A psychological model of grounding and repair in dialog, Proceedings of the 1999 AAAI Fall Symposium: Psychological Models of Communication in Collaborative Systems, pp.25-33, 1999.

M. Capozzi, P. Rothstein, and K. Curley, Approaches for distributed learning through computer-supported collaborative learning, Conference on Computer-Supported Cooperative Work (CSCW '96), 1996.

A. Chabert, E. Grossman, L. Jackson, S. Pietrowicz, and C. Seguin, Java object-sharing in Habanero, Communications of the ACM, vol.41, issue.6, pp.69-76, 1998.
DOI : 10.1145/276609.276622

T. W. Chan and A. Baskin, Studying with the prince: The computer as a learning companion, Proceedings of the ITS '88 Conference, pp.194-200, 1988.

M. Deutsch, Cooperation and trust: Some theoretical notes, Nebraska Symposium on Motivation, pp.275-320, 1962.

P. Dillenbourg, What do you mean by " Collaborative Learning, Collaborative Learning: Cognitive and Computational Approaches, 1999.
URL : https://hal.archives-ouvertes.fr/hal-00190240

W. Doise, G. Mugny, and A. Perret-clermont, Social interaction and the development of cognitive operations, European Journal of Social Psychology, vol.2, issue.3, pp.367-383, 1975.
DOI : 10.1002/ejsp.2420050309

F. Flores, M. Graves, B. Hartfield, and T. Winograd, Computer systems and the design of organizational interaction, ACM Transactions on Information Systems, vol.6, issue.2, pp.153-172, 1988.
DOI : 10.1145/45941.45943

B. Fox, The Human Tutorial Dialogue Project, 1993.

B. Goodman, A. Soller, F. Linton, and R. Gaimari, Encouraging Student Reflection and Articulation Using a Learning Companion: A Commentary, International Journal of Artificial Intelligence in Education, vol.6, issue.3, pp.3-4, 1998.
DOI : 10.1007/s40593-015-0041-4

M. Guzdial, C. Hmelo, R. Hubscher, W. Newstetter, S. Puntambekar et al., Integrating and guiding collaboration, Proceedings of the 2nd international conference on Computer support for collaborative learning, CSCL '97, pp.91-100, 1997.
DOI : 10.3115/1599773.1599784

H. U. Hoppe, The use of multiple student modeling to parameterize group learning, Proceedings of the 7 th World Conference on Artificial Intelligence in Education, pp.234-241, 1995.

S. Jarboe, Procedures for Enhancing Group Decision Making, Communication and Group Decision Making, pp.345-383, 1996.
DOI : 10.4135/9781452243764.n12

H. Jeong and M. Chi, Construction of shared knowledge during collaborative learning, Proceedings of the 2nd international conference on Computer support for collaborative learning, CSCL '97, pp.124-128, 1997.
DOI : 10.3115/1599773.1599788

P. Jermann and P. Dillenbourg, An analysis of learner arguments in a collective learning environment, Proceedings of the 1999 conference on Computer support for collaborative learning, CSCL '99, pp.265-273, 1999.
DOI : 10.3115/1150240.1150273
URL : https://hal.archives-ouvertes.fr/hal-00190257

P. Jermann and D. Schneider, Semi-structured interface in collaborative problem solving, Proceedings of the First Swiss Workshop on Distributed and Parallel Systems, 1997.

D. Johnson, R. Johnson, and E. J. Holubec, Circles of learning: Cooperation in the classroom, 1990.

S. Katz and A. Lesgold, The role of the tutor in computer-based collaborative learning situations, Computers as Cognitive Tools, 1993.

T. Koschmann, A. Kelson, P. Feltovich, and H. Barrows, Computer-supported problembased learning, CSCL: Theory and Practice of an Emerging Paradigm, pp.83-124, 1996.

V. Kumar, G. Mccalla, and J. Greer, Helping the peer helper, Proceedings of the 9th World Conference on Artificial Intelligence in Education (AI-ED '99), pp.325-332, 1999.

M. Matessa and J. Anderson, Towards an ACT-R model of communication in problem solving, Proceedings of the 1999 AAAI Fall Symposium: Psychological Models of Communication in Collaborative Systems, pp.67-72, 1999.

M. Mcmanus and R. Aiken, The group leader paradigm in an Intelligent Collaborative Learning System, Proceedings of the 7th World Conference on Artificial Intelligence in Education (AI-ED 93), pp.249-256, 1993.

M. Mcmanus and R. Aiken, Monitoring computer-based problem solving, Journal of Artificial Intelligence in Education, vol.6, issue.4, pp.307-336, 1995.

O. Day, V. Bobrow, D. Bobrow, K. Shirley, M. Hughes et al., Moving Practice: From Classrooms to MOO Rooms, The Journal of Collaborative Computing, pp.9-45, 1998.
DOI : 10.1023/A:1008632104055

J. Robertson, J. Good, and H. Pain, BetterBlether: The design and evaluation of a discussion tool for education, International Journal of Artificial Intelligence in Education, vol.9, pp.3-4, 1998.

J. Roschelle and S. Teasley, The Construction of Shared Knowledge in Collaborative Problem Solving, Computer-Supported Collaborative Learning, pp.69-97, 1995.
DOI : 10.1007/978-3-642-85098-1_5

J. Rumbaugh, M. Blaha, W. Premerlani, F. Eddy, and W. Lorensen, Object-Oriented modeling and design, 1991.

G. Salomon and T. Globerson, When teams do not function the way they ought to, International Journal of Educational Research, vol.13, issue.1, pp.89-98, 1989.
DOI : 10.1016/0883-0355(89)90018-9

K. Samuel, S. Carberry, and K. Vijay-shanker, Dialogue act tagging with transformationbased learning, Proceedings of the 17 th International Conference on Computational Linguistics, pp.1150-1156, 1998.

M. Scardamalia and C. Bereiter, Computer Support for Knowledge-Building Communities, Journal of the Learning Sciences, vol.1, issue.3, pp.265-283, 1994.
DOI : 10.1207/s15327809jls0303_3

J. R. Searle, SPEECH ACTS: An Essay in the Philosophy of Language, 1969.
DOI : 10.1017/CBO9781139173438

M. Singley, P. Fairweather, and S. Swerling, Team tutoring systems, Proceedings of the 1999 conference on Computer support for collaborative learning, CSCL '99, pp.538-548, 1999.
DOI : 10.3115/1150240.1150306

A. Soller, B. Goodman, F. Linton, and R. Gaimari, Promoting effective peer interaction in an intelligent collaborative learning environment, Proceedings of the Fourth International Conference on Intelligent Tutoring Systems (ITS '98), pp.186-195, 1998.

A. Soller, F. Linton, B. Goodman, and R. Gaimari, [Videotaped study: 3 groups of 4-5 students each solving software system design problems using Object Modeling Technique during a one week course at The MITRE Institute], 1996.

D. Suthers, A. Weiner, J. Connelly, and M. Paolucci, Belvedere: Engaging students in critical discussion of science and public policy issues, Proceedings of the 7 th World Conference on Artificial Intelligence in Education, pp.266-273, 1995.

S. Teasley and J. Roschelle, Constructing a joint problem space, Computers as cognitive tools, pp.229-257, 1993.

J. Vassileva and B. Wasson, Instructional planning approaches: From tutoring towards free learning, Proceedings of Euro-AIED'96, pp.1-8, 1996.

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.

B. Wydaeghe and K. Verschaeve, A Java OMT Editor, 1997.

J. D. Zapata and J. Greer, Collaborative learning environments based on " Acting Coach " agents. Poster presented at CSCL '99, 1999.