- SGI OpenGL Programming Kitchen/Lab 1997 - OpenGL API-based Code Details
- Revision history of "Getting started" - OpenGL.org
- Official feedback on OpenGL 4.1 thread - OpenGL.org Discussion and Help Forums
- glProgramParameteri issue - OpenGL.org Discussion and Help Forums
- Real-time "Free Hand" shader edge effect? - OpenGL.org Discussion and Help Forums
- OpenGL-based Real-Time Shadows - OpenGL API-based Code Details

