1. M. A. Kuzenkova and P. S. Kislyi, Poroshkovaya Met., No. 5, 34 (1970).
2. J. Friedel, Les Dislocations, Gauthier-Villars, Paris (1956).
3. P. S. Kislyi and M. A. Kuzenkova, Abstracts of Papers to the Fourth All-Union Conference [in Russian], Kishinev (1968), p. 120.