1. F. R. N. Nabarro, “Report of a Conference on the Strength of Solids,” Physical Society, London, 75–90 (1948).
2. C. Herring, J. Appl. Phys. 21, 437 (1950).
3. R. L. Coble, J. Appl. Phys. 34, 1679 (1963).
4. J. Weertman, Trans. ASM 61, 681 (1968).
5. J. E. Bird, A. K. Mukherjee and J. F. Dorn, p. 255 in Quantitative Relations Between Properties and Microstructure, D. G. Brandon and A. Rosen, eds. Israel Univ. Press (1969).