Relationship between size, effort, duration and number of contributors in large FLOSS projects. 7th BElgian-NEtherlands software eVOLution workshop - BENEVOL 2008 [Internet]. 2008;. http://oro.open.ac.uk/27317/1/ .
Understanding Free/Open Source Software Evolution. In: . Software Evolution and Feedback: Theory and Practice. New York: John Wiley and Sons Inc.; 2006. pp. 181-206. .