1. Z. Marciniak:Aspects of Material Formability, McMaster University, Hamilton, ON, Canada, 1974.
2. S. L. Semiatin and J. J. Jonas:Formability and Workability of Metals: Plastic Instability and Flow Localization, ASM, Metals Park, OH, 1984.
3. S. Y. Chung and H.W. Swift:Proc. Inst. Mech. Engrs., 1951, vol. 165, p. 199.
4. J.M. Alexander:Metallurgical Reviews, 1960, vol. 5, p. 349.
5. W. A. Backofen:Deformation Processing, Addison-Wesley, Reading, MA, 1972.