* Page with licence compatibility
http://www.gnu.org/licenses/quick-guide-gplv3.fr.html

* FAQ on GPL licence
http://www.fsf.org/licensing/licenses/gpl-faq.html

* Questions/Answers on Fork for using Dolibarr as a SaaS
http://stackoverflow.com/questions/539291/rebranding-a-gpld-app-as-saas