@article{DAN_1975_225_3_a1,
     author = {V. K. Dzyadyk},
     title = {An application of the methods of the theory of quasiconformal mappings to obtain direct theorems for the approximation of functions},
     journal = {Doklady Akademii Nauk},
     pages = {491--494},
     publisher = {mathdoc},
     volume = {225},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_3_a1/}
}