1. Common development and distribution license (CDDL-1.0). Published by Open Source Initiative.
https://opensource.org/licenses/CDDL-1.0
2. The MIT license. Published by Open Source Initiative.
https://opensource.org/licenses/MIT
3. WYSIWYG, p. 1936. Springer, Boston (2001).
https://doi.org/10.1007/1-4020-0613-6_21274
4. Erste Schritte, pp. 13–46. Springer, Heidelberg (2006).
https://doi.org/10.1007/978-3-540-34584-8_2
5. GNU GPL general public license version 3, 29 June 2007. Published by Free Software Foundation (2007).
http://www.gnu.org/licenses/gpl.html