1. The evolution of function and behaviour during mechanical design;Ullman,1993
2. An object oriented representation for mechanical design based on constraints;McGinnis,1990
3. Conversions with Knut Aasland (Norwegian Institute of Technology, University of Trondheim, Norway) regarding the design theories, Oregon State Unviersity 1992–1993
4. Conceptual development of from features and feature modelers;Shah;Research in Engineering Design,1991
5. A proposed taxonomy of mechanical design problems;Dixon,1988