@book{WillFree2002,
        title = {Free as in freedom},
        address = {Beijing [u.a.]},
        author = {Sam Williams},
        edition = {1. ed.},
        publisher = {O'Reilly},
        year = 2002,
        ISBN = {0-596-00287-4},
	description = {KUG Recherche-Portal},
	biburl = {http://www.bibsonomy.org/bibtex/2a598fd44f0b281d49524766604f5031e/flimm},
	keywords = {gnu oss}
}