@article{DAN_1966_169_3_a5,
     author = {V. V. Zhuk},
     title = {Approximation of periodic functions bounded by a subadditive operator},
     journal = {Doklady Akademii Nauk},
     pages = {515--518},
     publisher = {mathdoc},
     volume = {169},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_169_3_a5/}
}