1. de Bruijn, N.G.: A survey of the project AUTOMATH. In: Hindley, R., Seldin, J. (eds.) To H.B. Curry: Essays in Combinatory Logic, Lambda Calculus and Formalisms, pp. 579–606. Academic Press, London (1980)
2. Creative Commons BY-SA,
http://creativecommons.org/licenses/by-sa/3.0/
(last accessed 2011/03/14)
3. Free Software Foundation Europe, Fiduciary License Agreement (FLA),
http://fsfe.org/projects/ftf/fla.en.html
4. The FLOSSmole project,
http://flossmole.org/
5. Free Software Foundation: The GNU General Public License, version 3 (June 29, 2007),
http://www.gnu.org/licenses/gpl.html