Just collected a few useful resources. I was mainly looking for explanations and sample code about matrix calculus:

• OpenGL FAQ 9: Transformations – deprecated for whatever reason. I find helpful (opengl.org)
• StackOverflow questions - Understanding matrices
• How to multiply matrices (mathisfun.com). Well at least I understand this one.
• Egon Rath’s notes on OpenGL & 3D graphics.
• Songho’s pages on OpenGL.