* *[Release management within open source projects](http://www.erenkrantz.com/Geeks/Research/Publications/ReleaseManagement.pdf)* by Erenkrantz
* *Optimal release time of improved versions of software packages* by Levin and Yadid
* *[Quality practices and problems in free software projects](http://opensource.mit.edu/papers/michlmayr_hunt_probert-quality_practices_problems.pdf)* by Michlmayr, Hunt, Probert
+* *[Rules and Tools for Software Evolution Planning and Management](http://www.springerlink.com/content/l4216085h77324q6/fulltext.pdf)* by Lehman and Ramil
+* *[metrics and laws of software evolution - the nineties view](http://ieeexplore.ieee.org/iel3/5031/13795/00637156.pdf?tp=&arnumber=637156&isnumber=13795)* by Lehman and Ramil
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