1. J. W. Strutt, Lord Rayleigh, The Theory of Sound, 2nd ed. (Dover Publ., New York, 1945
2. Gos. Izd. Tekhniko-Teoreticheskoi Literatury, Moscow, 1955), Vol. 2.
3. G. Kirchhoff, London, Edinburgh Dublin Philos. Mag. J. Sci. Ser. 4, No. 130, 1 (1860). Translation from Ann. Phys. Chem. 109, 275 (1860).
4. M. Planck, Theory of Heat Radiation, 2nd ed. (P. Blakiston’s Son and Co., Philadelphia, PA, 1914). Translation from M. Planck, Vorlesungen uber die Theorie der Warmestrahlung (von Johann Ambrosius Barth Verlag, Leipzig, 1906).
5. L. D. Landau and E. M. Lifshits, The Classical Theory of Fields, Vol. 2 of Course of Theoretical Physics (Pergamon Press, Oxford, 1971; Nauka, Moscow, 1967).