1. M. G. Balinskii, V. V. Danilov, and A. Yu. Nechiporuk, Zh. Tekh. Fiz. 63(9), 122 (1993) [Tech. Phys. 38, 798 (1993)].
2. A. E. Siegmann, Microwave Solid-State Masers (McGraw-Hill, New York, 1964; Mir, Moscow, 1966).
3. V. V. Danilov, D. L. Lyfar’, Yu. V. Lyubon’ko, et al., Izv. Vyssh. Uchebn. Zaved., Fiz. 32(4), 48 (1989).
4. M. Marysko, J. Magn. Magn. Mater. 101(1), 159 (1991).
5. N. T. Cherpak, Izv. Vyssh. Uchebn. Zaved., Radiofiz. 27(7), 815 (1984).