Texture preview in Node Editor in node it self — Right-Click Select
Texture Node Editor not working when I try to edit a material. : r/blender
Material Basics (nodes) – Blender Knowledgebase
Mix Node — Blender Manual
Node-based texturing system design proposal (won't work, this an idea for a GPU based 2D texture authuring node editor) - Blender Development - Developer Forum
Verge3D for Blender: Shader Nodes Reference — Soft8Soft
Introduction to Nodes — Blender Manual
Layered Textures Design — Developer Blog
Shader Editor — Blender Manual
GSOC: Texture Node Editor :Discussion and Suggestion - Summer of Code - Developer Forum