%0 Journal Article %A V. V. Sobolev %T Diffusion of radiation when the scattering indicatrix is greatly drawn out in length %J Doklady Akademii Nauk %D 1967 %P 812-815 %V 177 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_4_a16/ %G ru %F DAN_1967_177_4_a16