1. A. B. Dichenko and V. V. Nikolayev, J. Magn. Magn. Mater. 53, 71 (1985).
2. V. V. Fedotova, A. P. Ges’, and T. A. Gorbachevskaya, Fiz. Tverd. Tela (St. Petersburg) 37, 2835 (1995) [Phys. Solid State 37, 1563 (1995)].
3. V. K. Vlasko-Vlasov, L. M. Dedukh, M. V. Indenbom, and V. I. Nikitenko, Zh. Éksp. Teor. Fiz. 84, 277 (1983) [Sov. Phys. JETP 57, 159 (1983)].
4. R. M. Sabitov and R. M. Vakhitov, Izv. Vyssh. Uchebn. Zaved., Fiz. 31, 51 (1988).
5. A. Hubert, Theorie der Domanenwande in geordneten Medien (Springer, Berlin, 1974; Mir, Moscow, 1977).