Links[1] https://ifross.org/?q=en/creative-commons-attribution-40-international [2] https://ifross.org/?q=en/user/login&destination=comment/reply/1644%23comment-form [3] https://ifross.org/?q=en/category/lizenzordnung/c-open-content-lizenzen [4] https://ifross.org/?q=en/category/tags/cc-40