1. Plastic instability and fracture in sheets stretched over rigid punches;Keeler;ASM Trans Q,1963
2. Application of strain analysis to sheet metal forming problems in the press shop;Goodwin,1968
3. Study on the formability of steel sheets, Yawata Tech Rep No. 264, September 1968;Nakazima,1968
4. Simple technique for determining forming limit curves;Hecker;Sheet Met Ind,1975
5. Limits of sheet metal formability;Marciniak,1971