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2. F. A. Crossley: Trans. TMS-AIME, 1967, vol. 245, p. 189.
3. M. V. Speight: Acta Met., 1960, vol. 16, p. 133.
4. C. Zener: Private Communication cited in C. S. Smith, Trans-AIME, 1948, vol. 175, p. 15.
5. S.G. Byrnes:Recovery, Recrystallization and Grain Growth, p. 100, MacMillan Co., 1965.