• Linda Brownsword, Paul Clements, Ulf Olsson: "Successful Product Line Engineering: A Case Study,". Software Technology Conference, Salt Lake City, April 1996.
• Withey, Investment Analysis of Software Assets for Product Lines CMU/SEI-96-TR-010
• Cohen, Friedman, Martin, Royer, Solderitsch, Webster Concept of Operations for ESC's Product Line Approach CMU/SEI-96-TR-018

• Report of the Reuse and Product Lines Working Group of WISR8 CMU/SEI-97-SR-010
• Product Line Practice Workshop Report CMU/SEI-97-TR-003
• Report on the Second International Workshop on Development and Evolution of Software Architectures for Product Families CMU/SEI-98-SR-003
• DoD Product Line Practice Workshop Report CMU/SEI-98-TR-007
• Second Product Line Practice Workshop Report CMU/SEI-98-TR-015

• Evolution and Composition of Reusable Assets in Product-Line Architectures: A Case Study
• Product-Line Architectures in Industry: A Case Study

A couple of related things

• OMG BOCA docs
• STARS (Software Technology for Adaptable Reliable Systems) Some of their work talks about something called "megaprogramming" which is effectively an earlier term for product-line development.
• Domain engineering

Margaret Davis (Boeing) Reengineering and the Product Line Approach to Software Development

(Here also are some yet-un-chased papers from the CS Bibliography)

Tool support

• short paper
• Task based tool support for framework specialization

Conferences

• SPLC2