2BIDARRA R,BRONSVOORT W F. Semantic Feature Modeling[J].Computer Aide Design,2000,32(3):201-225.
3BRONSVOORT W F,VERGEEST J S M. Freeform Feature Modeling:Concepts and Prospects[J].Computers in Industry,2002,49 (2):217-233.
4HIL DERICK A,BRONSVOORT W F. Specification of Freeform Features [C].Eighth ACM Symposium on Solid Modeling and Applications,New York:ACM Press,2003:56-64.
