1. A. A. Izvanov, A. E. Mandel′, N. D. Khat′kov, and S. M. Shandarov, Avtometriya, No. 2, 79–84 (1986).
2. S. I. Stepanov, S. M. Shandarov, and N. D. Khat′kov, Fiz. Tverd. Tela, 29, No. 10, 3054–3058 (1987).
3. V. V. Shepelevich, Zh. Tekh. Fiz., 55, No. 6, 1201–1203 (1985).
4. F. I. Fedorov, Theory of Gyrotropy [in Russian], Nauka i Tekhnika, Minsk (1976).
5. B. V. Bokut′ and A. N. Serdyukov, Fundamentals of Theoretical Crystal Optics [in Russian], Part 2, Gomel, GSU (1977).