1. A. M. Samson in: Spectroscopy of Light-Scattering Media [in Russian], Izd. Akad. Nauk BSSR, Minsk (1963), pp. 53?72.
2. S. Chandrasekhar, Radiative Transfer, Dover (1960).
3. V. V. Sobolev, Transfer of Raidant Energy in the Atmospheres of Stars and Planets [in Russian], GITTL, Moscow (1956).
4. V. M. Agranovich, Theory of Excitons [in Russian], Nauka, Moscow (1968).
5. V. M. Agranovich and M. D. Galanin, Tranfer of Electronic Excitation Energy in Condensed Media [in Russian], Nauka, Moscow (1978).