1. T. Zeffers, Strength Met. Alloys,2, 769 (1979).
2. A. F. Revuzhenko and E. I. Shemyakin, Zh. Prikl. Mekh. Tekh. Fiz., No. 3, 156 (1977).
3. V. A. Likhachev and V. V. Rybin, ?Disclination structure of deformed crystals,? Vestn. Leningr. Gos. Univ., Ser. Mat. Mekh., No. 1, 90 (1976).
4. I. I. Novikov and V. K. Portnoi, Superplasticity of Alloys with Ultrafine Grain [in Russian], Metallurgiya, Moscow (1981).
5. Z. W. Steeds, Proc. Soc.,A292, 343 (1966).