1. Crystal Detectors, Parts I and II [in Russian], Sovetskoe radio, 1950.
2. S. I. Ivanov, N. A. Penin, N. E. Skvortsova, and Yu. F. Sokolov, Physical Foundations of the Working of SHF Diodes [in Russian], Sovetskoe radio, 1965.
3. J. Bardeen, Bell. Syst. Tech. J.,29, 469, 1950.
4. P. G. Banbury, Proc. Phys. Soc.,66B, 833, 1953.
5. M. Cutler, Phys. Rev.,96, 255, 1954.