Links[1] https://www.ifross.org/?q=en/category/lizenzordnung/open-source-lizenzen/i-lizenzen-ohne-copyleft-effekt/bsdartige-lizenzen [2] https://www.ifross.org/?q=en/category/tags/xfree86 [3] https://www.ifross.org/?q=en/category/tags/xfree86-project-licence