1. V. V. Akindinov, V. I. Naryshkin, and A. M. Ryazantsev, Radiotekh. Elektron. (Moscow) 21, 913 (1976).
2. E. S. Kochanov and E. F. Zimin, Radiotekh. Elektron. (Moscow) 27, 1249 (1982).
3. V. V. Akindinov, I. V. Lishin, and V. G. Maksimenko, Radiotekh. Elektron. (Moscow) 29, 484 (1984).
4. V. G. Maksimenko, Radiotekh. Elektron. (Moscow) 47, 809 (2002) [J. Commun. Technol. Electron. 47, 727 (2002)].
5. V. G. Maksimenko, Radiotekhnika, No. 12, 81 (1985).