1. Born, M. and Wolf, E. 1964.Principles of Optics, second edition, 556–591. Oxford: Pergamon Press.
2. Fedorov, F.I. 1958.Optics of Anisotropic Media, 62–128. Minsk: Edition of Byelorussian Academy of Sciences.
3. Sokolov, A.V. 1961.Optical Properties of Metals, 32–61. Moscow: GIFML.
4. Fedorov, F.I. 1976.Theory of Hyrotropy, 67–81. Minsk: Nauka i Technique.