1. S. M. Rytov, Theory of Electric Fluctuations and Thermal Radiation (Akad. Nauk SSSR, Moscow, 1953; Electronics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command, U.S. Air Force, 1959)}.
2. M. L. Levin and S. M. Rytov, Theory of Equilibrium Thermal Fluctuations in Electrodynamics (Nauka, Moscow, 1967) [in Russian].
3. S. M. Rytov, Y. A. Kravtsov, and V. I. Tatarskii, Principles of Statistical Radiophysics (Springer, Berlin, 1987).
4. D. Polder and M. van Hove, Phys. Rev. B 4, 3303 (1971).
5. J. B. Pendry, J. Phys.: Condens. Matter 11, 6621 (1999).