D. Arruda, F. Bezerra, V. Neris, P. Toro, and J. Wainera, Brazilian computer science research: Gender and regional distributions, Scientometrics, vol.58, issue.2, pp.651-665, 2009.
DOI : 10.1007/s11192-007-1944-0

R. Bagozzi and U. Dholakia, Open Source Software User Communities: A Study of Participation in Linux User Groups, Management Science, vol.52, issue.7, 2006.
DOI : 10.1287/mnsc.1060.0545

L. Dabbish, C. Stuart, J. Tsay, and J. Herbsleb, Social coding in GitHub, Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work, CSCW '12, 2012.
DOI : 10.1145/2145204.2145396

G. Gousios, M. Pinzger, and A. Deursen, An exploration of the pull-based software development model. sep 2013

G. Hertel, S. Niedner, and S. Herrmann, Motivation of software developers in Open Source projects: an Internet-based survey of contributors to the Linux kernel, Research Policy, vol.32, issue.7, pp.1159-1177, 2003.
DOI : 10.1016/S0048-7333(03)00047-7

B. Kitchenham and S. Pfleeger, Personal Opinion Surveys, Guide to Advanced Empirical Software Engineering, pp.63-92, 2008.
DOI : 10.1007/978-1-84800-044-5_3

B. Kitchenham, S. Pfleeger, L. Pickard, P. Jones, D. Hoaglin et al., Preliminary guidelines for empirical research in software engineering, IEEE Transactions on Software Engineering, vol.28, issue.8, pp.721-734, 2002.
DOI : 10.1109/TSE.2002.1027796

L. Lin, A Concordance Correlation Coefficient to Evaluate Reproducibility, Biometrics, vol.45, issue.1, pp.255-268, 1989.
DOI : 10.2307/2532051

N. Mcdonald and S. Goggins, Performance and participation in open source software on GitHub, CHI '13 Extended Abstracts on Human Factors in Computing Systems on, CHI EA '13, pp.139-144, 2013.
DOI : 10.1145/2468356.2468382

C. Medeiros, From subject of change to agent of change, Proceedings of the international symposium on Women and ICT creating global transformation, CWIT '05, 2005.
DOI : 10.1145/1117417.1117432

C. Melo, V. Santos, E. Katayama, H. Corbucci, R. Prikladnicki et al., The evolution of agile software development in Brazil, Journal of the Brazilian Computer Society, vol.80, issue.4, pp.523-552, 2013.
DOI : 10.1007/s13173-013-0114-x

P. Morrison and E. Murphy, Is programming knowledge related to age? An exploration of stack overflow, 2013 10th Working Conference on Mining Software Repositories (MSR), 2013.
DOI : 10.1109/MSR.2013.6624008

J. Roberts, I. Hann, and S. Slaughter, Understanding the Motivations, Participation, and Performance of Open Source Software Developers: A Longitudinal Study of the Apache Projects, Management Science, vol.52, issue.7, pp.984-999, 2006.
DOI : 10.1287/mnsc.1060.0554

Y. Wang, D. Guo, and H. Shi, Measuring the evolution of open source software systems with their communities, ACM SIGSOFT Software Engineering Notes, vol.32, issue.6, 2007.
DOI : 10.1145/1317471.1317479