CAD Forum - List of blocks (incl. nested blocks) used in a DWG drawing.
Merging AutoCAD blocks using .NET - Through the Interface
What is a nested block and how to use it | AutoCAD flavoured
Writing nested blocks in AutoCAD
Blocks: change nested object color to "by block" (but main block color remains "by layer") - AutoLISP, Visual LISP & DCL - AutoCAD Forums
Blocks and external references
Dynamic Blocks with Visibility, Linear, & Lookup Parameters in AutoCAD – Part 4 – DDSCAD | Digital Drafting Systems
Message: "Select nested objects" when using REFEDIT in AutoCAD
Chapter 11: Block References and Attributes. After completing this Chapter, you will be able to use the following features: Create and insert block references. - ppt download
Combining Blocks Using Visibility States Within AutoCAD Dynamic Blocks - IMAGINiT Civil Solutions Blog