%0 Journal Article %A È. M. Saak %T On the boundedness of some integral operators %J Doklady Akademii Nauk %D 1973 %P 51-54 %V 211 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_211_1_a11/ %G ru %F DAN_1973_211_1_a11