1. T. Aaltonen and J. Jokinen, “Demography of linux kernel developers,” Tech. Rep. 41, Tampere University of Technology, Institute of Software Systems, 2006.
2. Netcraft, “Web server survey.” http://news.netcraft.com/archives/web_server_survey.html/, 2006.
3. R. McMillan, “Mozilla gains on IE,” PC World, 2004.
4. “Linux online.” http://linux.org, 2006.
5. L. Torvalds, “Developer’s certificate of origin 1.1.” http://www.osdl.org/newsroom/press_releases/2004/2004_05_24_dco.html, 2006.