Resources

Books

Currently the best book on configuration (no focus on Pricing and Quoting):

Knowledge-based Configuration: From Research to Business Cases by Alexander Felfernig, Lothar Hotz, Claire Bagley, Juha Tiihonen

 

How to implement a sales configurator at a company:

Product Customization by Lars Hvam

 

The original guru in mass customization:

Mass Customization by Joseph Pine

 

Analysts

Gartner (requires an account):

MarketScope for Configuration, Price, Quote Application Suites

 

Forrester (requires an account): 

Vendor Landscape: Configure-Price-Quote Solutions

Other resources

Wikipedia:

Knowledge-Based Configuration

Configure Price Quote