1. L. I. Antonov, L. I. Koshkin, and T. I. Nestrelei, Izv. Akad. Nauk SSSR. Ser. Fiz., XXXIV, No. 5, 1073–1076 (1970).
2. F. S. Kichmarenko, K. P. Koval, and V. D. Baurin, in: Film Single Crystals of Magnetically Ordering Substances. Proceedings [in Russian], Publishing House of the Institute of Physics SB RAS, Krasnoyarsk (1975), pp. 57–60.
3. F. S. Kichmarenko, V. G. Pynko, and A. S. Parshin, in: Physics of Magnetic Films. Proceedings [in Russian], Publishing House of Krasnoyarsk State Pedagogical Institute, Krasnoyarsk (1975), pp. 187–189.
4. L. I. Koshkin and G. V. Budrina, Magn. Elektron., 231, No. 9, 12–13 (1977).
5. D. G. Berezin and V. P. Gavrilin, Magn. Elektron., 104, 141–144 (1982).