M. Michlmayr, F. Hunt, and D. Probert, Quality practices and problems in free software projects, Proceedings of the First International Conference on Open Source Systems, pp.24-28, 2005.

D. C. Schmidt and A. Porter, Leveraging open-source communities to improve the quality & performance of open-source software, Proceedings of the 1st Workshop on Open Source Software Engineering, 2001.

I. Chengalur-smith, A. Sidorova, and S. Daniel, Sustainability of Free/Libre Open Source Projects: A Longitudinal Study, p.11, 2001.

A. Wiggins, J. Howison, and K. Crowston, Social Dynamics of FLOSS Team Communication Across Channels, Proceedings of the Fourth International Conference on Open Source Systems, 2008.
DOI : 10.1007/978-0-387-09684-1_11

T. Kilamo, Essential Properties of Open Development Communities, Proceedings of the OSS 2011 Doctoral Consortium, 2011.

D. J. Watts and A. , A twenty-first century science, Nature, vol.445, issue.7127, pp.489-489, 2007.
DOI : 10.1038/445489a

C. Jensen and W. Scachi, Role Migration and Advancement Processes in OSSD Projects: A Comparative Case Study, 29th International Conference on Software Engineering (ICSE'07), pp.364-374, 2007.
DOI : 10.1109/ICSE.2007.74

C. Dibona, D. Cooper, and M. Cooper, Open Sources 2.0: The Continuing Evolution, 2006.

K. Crowston and J. Howison, The social structure of free and open source software development, First Monday, vol.10, issue.2, 2004.
DOI : 10.5210/fm.v10i2.1207

D. Spinellis, G. Gousios, V. Karakoidas, P. Louridas, P. J. Adams et al., Evaluating the Quality of Open Source Software, Proceedings of the International Workshop on Software Quality and Maintainability, 2009.
DOI : 10.1016/j.entcs.2009.02.058

A. Mockus, R. T. Fielding, and H. J. , Two case studies of open source software development: Apache and Mozilla, ACM Transactions on Software Engineering and Methodology, vol.11, issue.3, pp.309-346, 2002.
DOI : 10.1145/567793.567795

S. Sowe, R. Ghosh, and K. Haaland, A Multi-repository Approach to Study the Topology of Open Source Bugs Communities: Implications for Software and Code Quality, 3rd IEEE International Conference on Information management and engineering, 2011.
DOI : 10.7763/IJCTE.2013.V5.663

C. Oezbek, L. Prechelt, and F. Thiel, The onion has cancer, Proceedings of the 3rd International Workshop on Emerging Trends in Free/Libre/Open Source Software Research and Development, FLOSS '10, pp.4-9, 2010.
DOI : 10.1145/1833272.1833274

H. Masmoudi, M. L. Den-besten, D. Loupy, C. Dalle, and J. M. , ???Peeling the Onion???, Fifth International Conference on Open Source Systems, 2009.
DOI : 10.1007/s10606-006-9017-0

S. Aral, E. Brynjolfsson, and M. Van-alstyne, Productivity Effects of Information Diffusion in E-mail Networks, Proceedings of ICIS 2007, 2007.

M. Aberdour, Achieving Quality in Open-Source Software, IEEE Software, vol.24, issue.1, pp.58-64, 2007.
DOI : 10.1109/MS.2007.2