1. Esin, ?Theoretical principles of engineering calculations,? Proc. Am. Soc. Mech. Eng.,1, 33 (1968).
2. J. Friedel, Dislocations, Pergamon, New York (1963).
3. I. M. Lifschitz and L. N. Rozentsveig, Zh. Eksp. Teor. Fiz.,16, 967 (1946).
4. A. G. Fokin and T. D. Shermergor, Prikl. Mat. Mekh.,32, 660 (1968).
5. L. D. Dikusar, E. F. Dudarev, and V. E. Panin, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 8, 96 (1971).