1. E. M. Gavrishchuk and E. V. Yashina, J. Opt. Technol. 71, 822 (2005).
2. N. T. Gurin, A. V. Shlyapin, and O. Yu. Sabitov, Tech. Phys. 47, 215 (2002).
3. V. D. Khoruzhii, Yu. I. Tyurin, and Yu. A. Sivov, Poverkhnost’, No. 4, 37 (2004).
4. I. K. Vereshchagin, B. A. Kovalev, L. A. Kosyachenko, and S. M. Kokin, Electroluminescent Sources of Light (Energoatomizdat, Moscow, 1990) [in Russian].
5. P. N. Krylov, E. A. Romanov, and I. V. Fedotova, Semiconductors 45, 125 (2011).