1. R. Z. Valiev and I. V. Aleksandrov, Nanostructured Materials Produced under Severe Plastic Deformation, (Logos, Moscow, 2000) [in Russian].
2. I. E. Kurov, V. A. Stepanov, and V. V. Shpeĭzman, Tr. Leningr. Politekh. Inst., No. 305, 71 (1969).
3. V. M. Segal, V. I. Reznikov, V. I. Kopylov, D. A. Pavlik, and V. F. Malyshev, Processes of Plastic Structure Formation in Metals (Navuka i Tékhnika, Minsk, 1994) [in Russian].
4. B. I. Smirnov, V. V. Shpeĭzman, and V. I. Nikolaev, Fiz. Tverd. Tela (St. Petersburg) 47(5), 816 (2005) [Phys. Solid State 47 (5), 840 (2005)].
5. A. Seeger, Z. Metallkd. 72, 369 (1981).