%0 Journal Article %A V. V. Sobolev %T Correlation between the emissivity and absorptivity of medium %J Doklady Akademii Nauk %D 1973 %P 1096-1098 %V 212 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_212_5_a18/ %G ru %F DAN_1973_212_5_a18