1. R. L. Whiteley and D. E. Wise:Flat Rolled Products, III, pp. 47–63, Interscience, New York, 1962.
2. Amer. Soc. Testing Mater., Special Tech. Publ. No. 390, 1965, p. 44.
3. M. Shimizu, K. Matsuda, Y. Sadamura, N. Takahashi, and M. Kawarada: U. S. Patent 3,522,110, July 28,1970.
4. D. A. Karlyn, R. W. Vieth, and J. L. Forand:Mechanical Working and Steel Processing VII, p. 127, AIME, New York, 1969.
5. J. A. Elias and R. E. Hook:Mechanical Working and Steel Processing IX, pp. 348–68, AIME, New York, 1970.