@article{TM_1981_155_a2,
     author = {E. M. Dyn'kin},
     title = {Constructive characterization of {S.} {L.~Sobolev} and {O.} {V.~Besov} classes},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {41--76},
     year = {1981},
     volume = {155},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1981_155_a2/}
}