B. Everett, S. P. Borgatti, and M. G. Everett, Models of core/periphery structures, Social Networks, vol.21, pp.375-395, 1999.

. Borgatti, UCINET 6 For Windows: Software for Social Network Analysis, 2002.

. De-laat, Investigating patterns of interaction in networked learning and computer-supported collaborative learning: A role for Social Network Analysis, International Journal of Computer-Supported Collaborative Learning, vol.293, issue.3, pp.87-103, 2007.
DOI : 10.1007/s11412-007-9006-4

L. C. Freeman, Centrality in social networks conceptual clarification, Social Networks, vol.1, issue.3, pp.215-239, 1979.
DOI : 10.1016/0378-8733(78)90021-7

. Fruchtermann, Graph drawing by force-directed placement, Software: Practice and Experience, vol.41, issue.11, pp.1129-1164, 1991.
DOI : 10.1002/spe.4380211102

N. Fujita and C. Teplovs, Automating the analysis of collaborative discourse, Proceedings of the 9th international conference on Computer supported collaborative learning, CSCL'09, pp.162-164, 2009.
DOI : 10.3115/1599503.1599558

. Furstenberg, Giving a virtual voice to the silent language of culture: the cultura project, LLTJ, vol.1, issue.5, pp.55-102, 2001.

. Landauer, An introduction to latent semantic analysis, Discourse Processes, pp.259-284, 1998.
DOI : 10.1080/01638539809545030

. Martinez, 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

URL : https://hal.archives-ouvertes.fr/hal-00190427

. Nurmela, Evaluating CSCL log files by social network analysis, Proceedings of the 1999 conference on Computer support for collaborative learning, CSCL '99, pp.434-444, 1999.
DOI : 10.3115/1150240.1150294

P. E. Pattison, Social cognition in context: Some applications of social network analysis Advances in social network analysis in the social and behavioral sciences, pp.79-109, 1994.

C. Reffay and T. Chanier, Mesurer la cohésion d'un groupe d'apprentissage en formation à distance, Actes de la conférence Environnements Informatiques pour l'Apprentissage Humain (EIAH'2003), pp.367-378, 2003.

C. Reffay and T. Chanier, How Social Network Analysis can help to Measure Cohesion in Collaborative Distance-Learning, Designing for change in networked learning. Proceedings of the international conference on Computer Supported Collaborative Learning, pp.343-352, 2003.
DOI : 10.1007/978-94-017-0195-2_42

URL : https://hal.archives-ouvertes.fr/edutice-00000422

M. Scardamalia, C. Bereiter, and J. Scott, Learning to work creatively with knowledge Unravelling basic components and dimensions of powerful learning environments. EARLI Advances in Learning and Instruction Series Social Network Analysis: a handbook, SAGE, 2000.

C. Teplovs and M. Scardamalia, Visualizations for knowledge building assessment, 2007.