1. Ohmic Contacts to Semiconductor, Ed. by B. Schwartz (Electrochem Soc., New York, 1969).
2. T. V. Blank and Yu. A. Gol’dberg, Semiconductors 41, 1263 (2007).
3. R. Quay, Gallium Nitride Electronics (Springer, Berlin, Heidelberg, 2008).
4. A. G. Vasil’ev, Yu. V. Kolkovskii, and Yu. A. Kontsevoi, Microwave Wide-Gap Semiconductor Devices and Facilities (Tekhnosfera, Moscow, 2011) [in Russian].
5. M. G. Mil’vidskii and V. B. Osvenskii, Structural Defects in Epitaxial Layers of Semiconductors (Metallurgiya, Moscow, 1985) [in Russian].