1. E. P. Dahlberg:Trans. ASM, 1965, vol. 58, pp. 46–53.
2. W. A. Van Der Sluys:J. Basic Eng., 1965, vol. 87, pp. 363–73.
3. R. P. Wei and J. P. Landes:Mater. Res. Std., 1969, vol. 9, pp. 25–27.
4. J. P. Gallagher and G. M. Sinclair:J. Basic Eng., 1969, vol. 91, pp. 598–602.
5. T. W. Crooker, R. W. Judy, Jr., E. A. Lange, and R. E. Morey:Trans. ASM, 1966, vol. 59, pp. 195–207.