Contains the keyword core

Mani S, Sinha S, Sinha VS. Entering the circle of trust. In: Proceeding of the 8th working conference on Mining software repositories - MSR '11. New York, New York, USA: ACM Press; 2011. p. 133-42. Abstract
Crowston K, Wiggins A, Howison J. Analyzing Leadership Dynamics in Distributed Group Communication. In: 2010 43rd Hawaii International Conference on System Sciences (HICSS 2010). Honolulu, Hawaii, USA: IEEE; 2010. p. 1-10. Abstract  Download: 07-06-02.pdf (478.73 KB)
Robles G, Gonzalez-Barahona JM, Herraiz I. Evolution of the core team of developers in libre software projects. In: 2009 6th IEEE International Working Conference on Mining Software Repositories (MSR)2009 6th IEEE International Working Conference on Mining Software Repositories. Vancouver, BC, Canada: IEEE; 2009. p. 167-70. Abstract  Download: 167core-evolution.pdf (409.39 KB)
David PA, Rullani F. Dynamics of innovation in an "open source" collaboration environment: lurking, laboring, and launching FLOSS projects on SourceForge. Industrial and Corporate Change. 2008;17(4):647-710. Abstract
Bird C, Gourley A, Devanbu P, Swaminathan A, Hsu G. Open Borders? Immigration in Open Source Projects. In: Fourth International Workshop on Mining Software RepositoriesFourth International Workshop on Mining Software Repositories (MSR'07:ICSE Workshops 2007). Minneapolis, MN, USA: IEEE; 2007. p. 6. Abstract  Download: 28300006.pdf (280.4 KB)
Weiss M, Moroiu G, Zhao P. Evolution of Open Source Communities. In: OSS2006: Open Source Systems (IFIP 2.13). Springer; 2006. p. 21-32. (IFIP International Federation for Information Processing). Abstract  Download: Evolution of Open Source Communities (609.08 KB)
Robles G, Gonzalez-Barahona J. Contributor Turnover in Libre Software Projects. In: OSS2006: Open Source Systems (IFIP 2.13). Springer; 2006. p. 273-86. (IFIP International Federation for Information Processing). Abstract  Download: Contributor Turnover in Libre Software Projects (932.6 KB)
Roberts J, Hann I-, Slaughter S. Communication Networks in an Open Source Software Project. In: OSS2006: Open Source Systems (IFIP 2.13). Vol 203/2006. Springer; 2006. p. 297-306. (IFIP International Federation for Information Processing ; vol 203/2006). Abstract  Download: Communication Networks in an Open Source (475.82 KB)
Crowston K, Wei K, Li Q, Howison J. Core and periphery in Free/Libre and Open Source software team communications. Proceedings of the 39th Annual Hawaii International Conference on System Sciences-Volume 06. 2006. Abstract
Dinh-Trong TT, Bieman JM. The FreeBSD Project: A Replication Case Study of Open Source Development. IEEE Trans. Software Eng.. 2005;31:481-94. Abstract  Download: DinhTrungBieman.pdf (982.33 KB)