1. N.-M. Wang and M. L. Wenner:Int. J. Mech. Sci., 1974, vol. 16, pp. 135–143.
2. V. Nagpal, T. L. Subramanian, and T. Altan:ICAM Mathematical Modeling of Sheet Metal Formability Indices and Sheet Metal Forming Processes, AFML-TR-79-4168, Battelle’s Columbus Laboratories, Columbus, OH, 1979.
3. S. C. Tang:Computers and Structures, 1980, vol. 13, pp. 363–370.
4. N. -M. Wang: “An Analytical and Experimental Study of Notched Stretch Flanging,” AIME Volume, Novel Techniques in Metal Deformation Testing, R. H. Wagoner, ed., 1983, pp. 309–321.
5. S. C. Tang: Ford Motor Co., Dearborn, MI, unpublished research.