1. B.S. Levy and R. H. Hilsen: Inland Steel Company, unpublished experimental work, 1978.
2. Jack Stepanian: Ford Motor Company, private communication, October 15, 1981.
3. R. G. Davies: “Springback in High Strength Steels,”J. Appl. Metal-work., January 1981, vol. 1, no. 4.
4. C. A. Queener and R. J. DeAngelis: “Elastic Springback and Residual Stresses in Sheet Metal Formed by Bending,”Trans. ASM, 1968, vol. 61, p. 757.
5. N. Kuhn: “On the Springback Behavior of Low Carbon Steel Sheet After Stretch Bending,”J. Australian Inst. Met., February 1967, vol. 12, no. 1, p. 71.