%0 Journal Article %A V. V. Sobolev %T Radiation diffusion in a plane layer of large optical thickness %J Doklady Akademii Nauk %D 1964 %P 316-319 %V 155 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a19/ %G ru %F DAN_1964_155_2_a19