%0 Journal Article %A E. M. Dyn'kin %T Constructive characterization of S.\,L.~Sobolev and O.\,V.~Besov classes %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1981 %P 41-76 %V 155 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1981_155_a2/ %G ru %F TM_1981_155_a2