1. A. B. Greninger:Trans. ASM, 1942, vol. 30, pp. 1–26.
2. M. J. Bibby and J. G. Parr:J. Iron Steel Inst., 1964, vol. 202, pp. 100–04.
3. Spec. Report;W. S. Owen,1965
4. A. B. Greninger and A. R. Troiano:Trans. ASM, 1940, vol. 28, pp. 537–63.
5. R. T. Howard and M. Cohen:Trans. TMS-AIME, 1948, vol. 176, pp. 384–97.