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@article{DAN_1977_233_5_a3, author = {E. M. Dyn'kin}, title = {On a constructive characterization of {Sobolev} and {Besov} classes}, journal = {Doklady Akademii Nauk}, pages = {773--775}, publisher = {mathdoc}, volume = {233}, number = {5}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_5_a3/} }
E. M. Dyn'kin. On a constructive characterization of Sobolev and Besov classes. Doklady Akademii Nauk, Tome 233 (1977) no. 5, pp. 773-775. http://geodesic.mathdoc.fr/item/DAN_1977_233_5_a3/