Contains the keyword Free/libre software
Preliminary steps toward a general theory of internet-based collective-action in digital information commons: Findings from a study of open source software projects. International Journal of the Commons [Internet]. 2013;7. http://www.thecommonsjournal.org/index.php/ijc/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-114926 .