Characteristics of Open Source Projects

A. Capiluppi, Lago, P., and Morisio, M., Characteristics of Open Source Projects, in 7th European Conference on Software Maintenance and Reengineering (CSMR'03), 2003, p. 317-.
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When do changes induce fixes?

J. Sliwerski, Zimmermann, T., and Zeller, A., When do changes induce fixes?, in Proceedings of the 2005 international workshop on Mining software repositories, New York, NY, USA, 2005, pp. 24-28.