S. Asur, S. Parthasarathy, and D. Ucar, An event-based framework for characterizing the evolutionary behavior of interaction graphs, in ACM Trans. Knowledge Discovery Data. Article, vol.3, issue.16, 2009.

M. Bastian, S. Heymann, and M. Jacomy, Gephi: an open source software for exploring and manipulating networks, presented at the Int. AAAI Conf. on Weblogs and Social Media, 2009.

K. Bezrukova, C. S. Spell, and J. L. Perry, VIOLENT SPLITS OR HEALTHY DIVIDES? COPING WITH INJUSTICE THROUGH FAULTLINES, Personnel Psychology, vol.13, issue.3, 2010.
DOI : 10.1111/j.1744-6570.2010.01185.x

C. Bird, D. Pattison, R. D. Souza, V. Filkov, and P. Devanbu, Latent social structure in open source projects, Proceedings of the 16th ACM SIGSOFT International Symposium on Foundations of software engineering, SIGSOFT '08/FSE-16, pp.24-35, 2008.
DOI : 10.1145/1453101.1453107

U. Brandes, A faster algorithm for betweenness centrality*, The Journal of Mathematical Sociology, vol.113, issue.2, pp.163-177, 2001.
DOI : 10.1016/S0378-8733(97)00007-5

L. R. Ford and D. R. Folkerson, A simple algorithm for finding maximal network flows and an application to the Hitchcock problem, Journal canadien de math??matiques, vol.9, issue.0, pp.210-218, 1957.
DOI : 10.4153/CJM-1957-024-0

T. M. Fruchterman and E. M. Reingold, Graph drawing by force-directed placement, Software: Practice and Experience, vol.41, issue.11, p.11291164, 1991.
DOI : 10.1002/spe.4380211102

A. Hannemann and R. Klamma, Community Dynamics in Open Source Software Projects: Aging and Social Reshaping, Proc. of the IFIP Second Int. Conf. on Open Source Systems, pp.80-96, 2013.
DOI : 10.1007/978-3-642-38928-3_6
URL : https://hal.archives-ouvertes.fr/hal-01467583

J. Howison and K. Crowston, The perils and pitfalls of mining SourceForge, "International Workshop on Mining Software Repositories (MSR 2004)" W17S Workshop, 26th International Conference on Software Engineering, pp.7-11, 2004.
DOI : 10.1049/ic:20040467

J. Howison, K. Inoue, and K. Crowston, Social dynamics of free and open source team communications, Proc. of the IFIP Second Int. Conf. on Open Source Systems, pp.319-330, 2006.
DOI : 10.1007/0-387-34226-5_32

J. Howison, M. Conklin, and K. Crowston, FLOSSmole: A collaborative repository for FLOSS research data and analyses, Int. Journal of Information Technology and Web Engineering, vol.1, issue.3, p.1726, 2006.

V. Kuechler, C. Gilbertson, and C. Jensen, Gender Differences in Early Free and Open Source Software Joining Process Open Source Systems: Long-Term Sustainability, 2012.

J. Kunegis, S. Sizov, F. Schwagereit, and D. Fay, Diversity dynamics in online networks, Proceedings of the 23rd ACM conference on Hypertext and social media, HT '12
DOI : 10.1145/2309996.2310039

J. Leskovec, J. Kleinberg, F. , and C. , Graphs over time, Proceeding of the eleventh ACM SIGKDD international conference on Knowledge discovery in data mining , KDD '05, 2005.
DOI : 10.1145/1081870.1081893

J. Leskovec, K. J. Lang, A. Dasgupta, and M. W. Mahoney, Statistical properties of community structure in large social and information networks, Proceeding of the 17th international conference on World Wide Web , WWW '08, 2008.
DOI : 10.1145/1367497.1367591

A. Noack, Energy Models for Graph Clustering, Journal of Graph Algorithms and Applications, vol.11, issue.2, p.453480, 2007.
DOI : 10.7155/jgaa.00154

L. Nyman, Understanding code forking in open source software, Proc. of the 7th Int. Conf. on Open Source Systems Doctoral Consortium, 2011.

L. Nyman, T. Mikkonen, J. Lindman, and M. Fougère, Forking: the invisible hand of sustainability in open source software, Proc. of SOS 2011: Towards Sustainable Open Source, 2011.

G. Robles and J. M. Gonzalez-barahona, A Comprehensive Study of Software Forks: Dates, Reasons and Outcomes, Proc. of the 8th Int. Conf. on Open Source Systems, 2012.
DOI : 10.1007/978-3-642-33442-9_1

S. Sowe, L. Stamelos, and L. Angelis, Identifying knowledge brokers that yield software engineering knowledge in OSS projects, Information and Software Technology, vol.48, issue.11, pp.1025-1033, 2006.
DOI : 10.1016/j.infsof.2005.12.019

M. R. Torres, S. L. Toral, M. Perales, and F. Barrero, Analysis of the Core Team Role in Open Source Communities, 2011 International Conference on Complex, Intelligent, and Software Intensive Systems, pp.109-114, 2011.
DOI : 10.1109/CISIS.2011.25

W. Zachary, An Information Flow Model for Conflict and Fission in Small Groups, Journal of Anthropological Research, vol.33, issue.4, pp.452-473, 1977.
DOI : 10.1086/jar.33.4.3629752