1. Landau, L.D. and Lifshits, E.M., Statisticheskaya fizika (Statistical Physics), Moscow: Nauka, 1976, part 1.
2. Levin, M.L. and Rytov, S.M., Teoriya ravnovesnykh teplovykh fluktuatsii v elektrodinamike (Theory of Equilibrium Thermal Fluctuations in Electrodynamics), Moscow: Nauka, 1967.
3. Volokitin, A.I. and Persson, B.N., Phys.—Usp., 2007, vol. 50, no. 9, p. 879.
4. Vinogradov, E.A. and Dorofeev, I.A., Phys.—Usp., 2009, vol. 52, no. 5, p. 425.
5. Bobrov, V.B., J. Phys.: Condens. Matter, 1990, vol. 2, no. 31, p. 6695.