1. 1. G.I. D'yakonov and V.A. Yugov, Izv. AN SSSR. Ser. Fiz. 3, 424 (1959).
2. 2. V.E. Kuznetsov and V.U. Usatov, Prib. Tekh. Eksp. 3, 157 (1962).
3. 3. I.V. Linchevskyi, O.N. Petrishchev, and V.O. Trokhimets', Ukr. Fiz. Zh. 55, 947 (2010).
4. 4. I.V. Linchevskyi, O.N. Petrishchev, and V.O. Trokhimets', Nauk. Visti NTTU "KPI" 4, 139 (2010).
5. 5. G.A. Smolenskii, R.V. Pisarev, and I.G. Sinii, Usp. Fiz. Nauk 116, 231 (1975).