1. O. D. Chwolson, “Grundzuge einer mathematischen Theorie der inneren Diffusion des Lichtes,” Bull. Acad. Imp. Sci., St.-Petersburg 33, 221–256 (1889).
2. L. A. Apresyan and Yu. A. Kravtsov, Theory of Radiation Transfer (Nauka, Moscow, 1983) [in Russian].
3. M. I. Mishchenko, “Multiple Scattering, Radiative Transfer, and Weak Localization in Discrete Random Media: Unified Microphysical Approach,” Rev. Geophys. 46, RG2003 (2008).
4. T. Nakajima and M. Tanaka, “Algorithms for Radiative Intensity Calculations in Moderately Thick Atmospheres Using a Truncation Approximation,” J. Quant. Spectrosc. Rad. Transfer 40, 51–59 (1988).
5. Radiative Transfer in Scattering and Absorbing Atmospheres: Standard Computational Procedures, Ed. by J. Lenoble (A. Deepak Publ., Hampton, Virginia USA, 1985; Gidrometeoizdat, Leningrad, 1990).