1. V. I. Zvereva and O. A. Ivanov, All-Union Institute of Scientific and Technical Information, No. 1609?1674.
2. V. I. Petinov et al., All-Union Institute of Scientific and Technical Information, No. 369?376.
3. V. I. Zvereva, O. A. Ivanov, Yu. P. Lobastov, et al., Phys. Status Solidi,A21, 269 (1974).
4. N. S. Akulov, Ferromagnetism [in Russian], Gos. Izd. Tekh. Teor. Lit., Moscow (1939).
5. V. F. Kumeishin and O. A. Ivanov, Fiz. Met. Metalloved.,46, No. 2, 269?273 (1978).