1. 1) Cottrell, A.H.:Dislocations and Plastic Flow in Crystals, (1953), 162, Clarendon Press, Oxford.
2. 2) Cahn, R. W. :J. Inst. Met., 79(1951),129-158.
3. 3) Chen, N. K. & Mathewson, C. H. :Trans. AIME, 3(1951), 653-660.
4. 4) Honeycombe, R. W. K. :J. Inst. Met., 80(1951-1952), 45-49.
5. 5) Nishimura, H. & Takamura, J. :J. Jpn. Inst. Met. A, 15(1951), 409; Tech. Rep. Eng. Res. Inst., Kyoto Univ., 2(1952), 139.