1. 2022. File With Apache 2.0 and My Modifications. https://softwareengineering.stackexchange.com/questions/220068/file-with-apache-2-0-and-my-modifications
2. 2022. First lawsuit over GPL settled. https://www.informationweek.com/software-services/first-lawsuit-over-gpl-settled-before-it-goes-to-court
3. 2022. First Open Source Gpl Violation Lawsuit Filed Us. https://www.lvcriminaldefense.com/first-open-source-gpl-violation-lawsuit-filed-us/
4. 2022. GNU General Public License 3.0. https://www.gnu.org/licenses/gpl-3.0.html
5. 2022. GNU Project. https://en.wikipedia.org/wiki/GNU_Project