Links
[1] https://www.ifross.org/?q=en/artikel/what-open-version-2-open-definition-open-knowledge-foundation-published
[2] https://www.ifross.org/?q=en/user/login&destination=comment/reply/1592%23comment-form
[3] http://opendefinition.org/od/
[4] https://www.ifross.org/?q=en/category/tags/foss
[5] https://www.ifross.org/?q=en/category/tags/open
[6] https://www.ifross.org/?q=en/category/tags/opendata