1. Burniston, E.E., and Siewert, C.E.: 1970,J. Math. Phys. 11, 3416.
2. Chandrasekhar, S.: 1960,Radiative Transfer, Dover Publ., Inc., New York.
3. Domke, H.: 1972,Transfer of Polarized Radiation, Thesis.
4. Hovenier, J.W.: 1970,Astron. Astrophys. 7, 86.
5. Sobolev, V.V.: 1972,Rasseyaniye Sveta v Atmosferakh Planet, Nauka, Moscow.