1. B. W. MOTT, in “Micro-Indentation Hardness Testing” (Butterworths, London, 1956) p. 206.
2. K. KISHAN RAO and D. B. SIRDESHMUKH,Ind. J. Pure Appl. Phys. 16 (1978) 860.
3. K. RIDGWAY, in “Crystallisation”, edited by J. W. Mullin (Butterworths, London, 1972) p. 76.
4. R. D. DESLATTES, J. L. TORGESEN, B. PARETZKIN and A. T. HORTON,J. Appl. Phys. 37 (1966) 541.
5. E. OROWAN,Nature 147 (1941) 452.