1. 1. Semiconductor parametric amplifiers and the SHF converters / Under edition of V.S. Etkin. // M.: Radio and telecommunication — 1983. — P. 333 (in Russian).
2. 2. I.A. Strukov Satellite technique of research of relict radiation anisotrophy (in frame of RELICT-2 project). // Radio tekhnika. —1995, No2, pp.3–12 (in Russian).
3. 3. O.N. Sukhoruchko, B.M. Bulgakov, A.I. Fisun, and O.I. Belous. Parametric Amplification of Signals in the Short-Wave Part of MM Wave Band // “Telecommunication and Radio Engineering”. — 2002. - Vol. 58, No 7–8. — P. 64–73.
4. 4. S. Nagano and S.A. Ohnaka Highly stabilized Ka-band Gunn oscillator. // IEEE Trans., 1972, MTT-20, No2, pp. 174–176.
5. 5. A.I. Fisun and O.I. Belous Quasi-optical solid-state electromagnetic wave sources. Principles, tendencies, and application. // Zarubezhnaya radioelektronika. Uspekhi sovremennoi radioelektroniky. —1999, —No4, pp. 41–64 (in Russian).