%0 Journal Article %A V. V. Sobolev %T Diffusion of radiation in a medium of high optical thickness where scattering is non-isotropic %J Doklady Akademii Nauk %D 1968 %P 41-44 %V 179 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a9/ %G ru %F DAN_1968_179_1_a9