1. M. Okyama, Ferroelectrics 33(1–4), 235 (1981)
2. R.A. Valitov et al., Technique of Submillimeter Waves (Moscow, Soviet Radio, 1969). (In Russian)
3. V.A. Zuev, V.G. Popov, Photoelectrical MIS-devices (Radio and Communications, Moscow, 1983). (In Russian)
4. R.L. Abrams, O.R. Woods, Appl. Phys. Lett 19(12), 518 (1971)
5. N.R. Agamalyan, T.A. Aslanyan, E.S. Vardyanyan, et al. Proc. NAS of Armenia Phys. 48(2), 136 (2013)