The D&D OGL controversy, explained - The Washington Post

Analysis: Nobody could dethrone 'Dungeons & Dragons' except Wizards of the Coast — and it may have done just that – GeekWire

After controversy over changes to the OGL, Wizards of the Coast backs down offers D&D content via Creative Commons

Dungeons & Dragons - Wikipedia

The creators of Pathfinder have released their own version of D&D's controversial OGL—and it could have a huge impact on all tabletop RPGs

DnD Open Game License: A Guide to Controversy - dicegeeks

Does OGL 1.1 Have Critical Role LEAVING D&D?! (AKA Everybody Hates Hasbro)

D&D's OGL Drama Spills Over Into the Mainstream - Bell of Lost Souls

Dungeons and Dragons: Wizards of the Coast Backs Down, Won't Deauthorize Original OGL

Open Game License - Wikipedia

The D&D OGL controversy, explained - The Washington Post