1. T. Angel, J. Iron Steel Inst. 177 (1954) 165.
2. G. W. Form and W. N. Baldwin, Jun., Trans. ASM 48 (1956) 474.
3. G. W. Powell, E. R. Marshall, and W. A. Backofen, Trans. ASM 50 (1958) 478.
4. J. P. Bressanelli and A. Moskowitz, Trans. ASM 59 (1966) 223.
5. W. O. Binder, Met. Prog. 58 No. 2 (1950) 201.