9Peterson,Paul. Component standardization in a distributed workstation CAD environment. Proceedings of the IEEE/CPMT International Electronics Manufacturing Technology(IEMT)Sympusiuml Sep, 1994:12-14.
10Choi G,Mun D,Han S. Exchange of CAD Part Models Based on the Macro - Parametric Approach. Intenational Journal of CAD/CAM ,2002(2) :23-31.