1. The Influencing Factors in Optimizing Press Tool Die Layouts and a Solution Using Computer Aids;Fogg;Annals of the CIRP,1975
2. s. Nakaharaet al.: Computer Aided Progressive Die Design, Proc. 19th MTDR Conf., 1978, pp.171-176.
3. O.F. Shifman : The PDDC System: A CAD-CAM Application to the Design and Fabrication of Press Tools, SME Technical Paper, 1973, TE73-107.
4. John W. Ryon III: Computer Processes as Supplement to Conventional Die Design Methods: Some Aspects of the PDDC System, SME Technical Paper, 1973, TE73-108.
5. H. MurakamiK. Shirai et al.: A CAD System for Progressive Dies, Proc. 21st MTDR Conf., 1980, pp.587-591.