1. V. F. Zackay, E. R. Parker, D. Fahr, and R. Busch:Trans. ASM, 1967, vol. 60, p. 252.
2. M. Azrin, G. B. Olson, and R. A. Gagne: Department of the Army Technical Report, AMMRC TR 73-12, March 1973.
3. T. Angel:J. Iron Steel Inst., 1954, vol. 177, p. 165.
4. W. W. Gerberich, G. Thomas, E. R. Parker, and V. F. Zackay:Proc. Second Int. Conf. on the Strength of Metals and Alloys, p. 894, Asilomar, California, August 1970.
5. G. W. Powell, E. R. Marshall, and W. A. Backofen:Trans. ASM, 1958, vol. 50, p. 479.