Torvalds, Linus (5. 1. 1992). „Release notes for Linux v0.12 (Биљешке уз представљање линукс верзије 0.12)”. Linux Kernel Archives. Приступљено 23. 7. 2007. „The Linux copyright will change: I've had a couple of requests to make it compatible with the GNU copyleft, removing the “you may not distribute it for money” condition. I agree. I propose that the copyright be changed so that it confirms to GNU ─ pending approval of the persons who have helped write code. I assume this is going to be no problem for anybody: If you have grievances ("I wrote that code assuming the copyright would stay the same") mail me. Otherwise The GNU copyleft takes effect since the first of February. If you do not know the gist of the GNU copyright ─ read it.”
„Linux Mark Institute (Институт за линукс робну марку)”. Приступљено 24. 2. 2008. „LMI has restructured its sublicensing program. Our new sublicense agreement is: Free – approved sublicense holders pay no fees; Perpetual – sublicense terminates only in breach of the agreement or when your organization ceases to use its mark; Worldwide – one sublicense covers your use of the mark anywhere in the world”
