%0 Journal Article %A A. G. Nikogosyan %T The problem of diffusion reflection in the redistribution of radiation according to frequencies and directions %J Doklady Akademii Nauk %D 1977 %P 786-789 %V 235 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a15/ %G ru %F DAN_1977_235_4_a15