1. V. N. Adrianov, in: Heat Transfer, Hydrodynamics, and Thermophysical Properties of Materials [in Russian], Nauka, Moscow (1968), p. 123.
2. S. Rosseland, Astrophysics and Atomic Theory (1932).
3. Ya. B. Zel'dovich and Yu. P. Raizer, Shock-Wave Physics and High-Temperature Hydrodynamic Phenomena [in Russian], Nauka, Moscow (1966).
4. A. V. Sokolov, Optical Properties of Metals [in Russian], Fizmatgiz, Moscow (1961).
5. J. Tauc, Optical Properties of Semiconductors in the Visible and Ultraviolet Regions [Russian translation], Mir, Moscow (1967).