1. G. E. Becker and S. H. Autler,Phys. Rev.,70, No. 5, 300 (1946).
2. V. Ya. Ryadov and N. I. Furashov,Izv. Vyssh. Uchebn. Zaved., Radiofiz.,15, No. 10, 1475 (1972).
3. L. M. Kukin, Yu. N. Nozdrin, V. Ya. Ryadov, L. I. Fedoseev, and N. I. Furashov,Radiotekh. Électron.,20, No. 10, 2017 (1975).
4. V. Ya. Ryadov and N. I. Furashov,Izv. Vyssh. Uchebn. Zaved., Radiofiz.,19, No. 9, 1308 (1976).
5. D. T. Llewellyn-Jones and R. J. Knight, in: Proceed. of 2nd Int. Conf. Antennas Propag., Heslington, 13?16 Apr. 1981, Pt. 2, London-New York (1981), p. 81.