J. E. Bardram, Plans as Situated Action: An Activity Theory Approach to Workflow Systems, Proceedings of the European Conference on Computer Supported Cooperative Work, 1997.

G. Bourguin, Un support informatique à l'activité coopérative fondé sur la Théorie de l'Activité : le projet DARE, Thèse de doctorat, 2000.

J. S. Bruner, La compétence, sa nature et comment on la cultive. Le développement de l'enfant : savoir faire, savoir dire, 1973.

J. Dewey, L'école et l'enfant, Neuchâtel: Delachaux et Niestlé, 1922.

S. L. Finkle and L. L. Et-torp, Introductory documents. Illinois: IMSA Center for Problem- Based Learning, Illinois Mathematics and Science Academy, 1994.

P. Fung, Issues in Project-Based Distance Learning in Computer Science, Journal of Distance Education, vol.11, issue.2, 1996.

S. George, Apprentissage collectif à distance. SPLACH : un environnement informatique support d'une pédagogie de projet, Thèse de doctorat, 2001.

P. Goguelin, Comment faire naître un projet, Dossier Projet, Sciences Humaines, vol.39, pp.30-31, 1994.

M. Gruninger and M. S. Et-fox, Methodology fot the Design and the Evaluation of Ontologies, Proceedings of the Workshop on Basic Ontological Issues in Knowledge Sharing, IJCAI- 95, 1995.

R. Hotte, Modélisation d'un système d'aide multiexpert pour l'apprentissage coopératif à distance, Thèse de doctorat, 1998.

O. Houdé, Vocabulaire des sciences cognitives, 1998.

A. R. Kaye, Learning Together Apart, Collaborative Learning through Computer Conferencing, 1992.
DOI : 10.1007/978-3-642-77684-7_1

K. Kuutti, Activity Theory as a Potential Framework for Human-Computer Interaction Research Massachusetts, Context and consciousness : Activity Theory and Human- Computer Interaction, pp.17-44, 1997.

A. Leontiev, Activité, Conscience, Personalité, Moscou: Editions du Progrès, 1984.

P. Light and V. Et-light, Analyzing asynchronous lerning interaction Computer mediated communication in a conventional undergraduate setting, Learning with computers: Analyzing productive interaction, pp.162-178, 1999.

G. Paquette, Modélisation des connaissances et des compétences : Un langage graphique pour concevoir et apprendre, 2002.

G. Paquette, Le Campus virtuel: un réseau d'acteurs et de ressources, Journal of Distance Education, vol.12, issue.1, 1997.

D. Peal and B. G. Et-wilson, Activity theory and web-based training, Web-based training, pp.147-153, 2001.

R. Rada and W. Et-wang, Computer-Supported Collaborative Writing Phases, Journal of Educational Technology Systems, vol.20, issue.3, pp.137-149, 1998.
DOI : 10.2190/1JPE-PPKN-LQ6P-46F2

J. R. Savery and T. M. Et-duffy, Problem-Based Learning, Cosntructivist learning environements. Case studies in instructional design, pp.135-148, 1996.
DOI : 10.4135/9781412957403.n352

G. Wells, Dialogue about knowledge building Liberal education in a knowledge society. Retrieved, from the World Wide Web: http://www.oise.utoronto.ca/~gwells What is a constructivist learning environment?, Constructivist learning environments. Case studies in instructional design, pp.3-8, 1996.

S. Yates, Gender and computer mediated communication: an analysis of DT200, CITE Report, vol.158, 1990.