@article{MZM_1991_49_6_a4,
     author = {O. V. Davydov},
     title = {Approximation of functions of class $C(\varepsilon)$ by sequences of de la {Vall\'ee-Poussin} sums},
     journal = {Matemati\v{c}eskie zametki},
     pages = {33--41},
     publisher = {mathdoc},
     volume = {49},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_6_a4/}
}