1. A. G. Vasil’ev, Yu. V. Kolkovskii, and Yu. A. Kontsevoi, UHF Instruments and Appliances Based on Broadband Semiconductors (Tekhnosfera, Moscow, 2011) [In Russian].
2. Gallium Nitride (GaN): Physics, Devices and Technology, Ed, by F. Medjdoub and K. Iniewski (CRC Press Taylor & Francis Group, London-New York, 2016).
3. R. Stevenson, Compd. Semicond., 12 (11), 31 (2006).
4. K. L. Enisherlova, A. V. Lyuttsau, and E. M. Temper, Single-Crystal X-Ray Diffractometry of Heterostructures (Yulis, Moscow, 2016) [In Russian].
5. Chap. 7;A. Trampert,1998