1. D. Lee:Met. Trans A., 1975, vol. 6A, p. 2083.
2. L. Varga, L. Bartha, A. J. Nagy, V. Stefaniay, and B. Borossary:Proceedings of the Fifth Conference on Dimensioning and Strength Calculations, 6th Conference Material Testing vol. 1, p. 236, Akademiai Kiado, Budapest, 1974.
3. D. B. Snow:Met. Trans., 1974, vol. 5, p. 2375.
4. H. G. Sell, D. F. Stein, R. Stickler, A. Joshi, and E. Berkey:J. Inst. Metals, 1972, vol. 100, p. 275.
5. A. Pebler, G. G. Sweeney, and P. M. Castle:Met. Trans A., 1975, vol. 6A, p. 991.