1. R.T. DeHoff:Trans. AIME, 1967, vol. 239, pp. 617–21.
2. J.W. Cahn:Trans. AIME, 1967, vol. 239, pp. 610–16.
3. E.E. Underwood:Quantitative Stereology, Addison-Wesley Publishing Co., Reading, MA, 1970, p. 219.
4. C. Zener: private communication to C.S. Smith; also,Trans. AIME, 1948, vol. 175, pp. 47–48.
5. N.A. Haroun and D.W. Budworth:J. Mater. Sci., 1968, vol. 3, pp. 326–28.