1. Tooling for deep drawing and ironing;Campion;Sheet Metal Ind.,1976
2. Tooling for deep drawing and ironing;Campion;Sheet Metal Ind.,1978
3. Better shapes for draw dies;Greguoli;American Machinist,1982
4. Numerical solutions of deep drawing through a tractrix die;Nakamura,1982
5. Deep drawing through tractrix type dies;Al-Makky;Int. J. Mech. Sci.,1980