1. S.P. Keeler:Sheet Met. Ind., 1965, pp. 683-91.
2. S.S. Hecken:Sheet Met. Ind., 1975, vol. 52, pp. 671–75.
3. A.K. Ghosh and S.S. Hecker:Metall. Trans., 1974, vol. 5, pp. 2161–64.
4. K.S. Raghavan: “A Simple Technique to Determine In-Plane Forming Limit Curves,” Presentation at the 1992 NADDRG Spring Meeting, Dearborn, MI, April 28-30, 1992.
5. A. Graf and W.F. Hosford:Metall. Trans. A, 1993, vol. 24A, pp. 2497–2501.