@article{DAN_1958_119_3_a3,
     author = {A. G. Vitushkin},
     title = {The closest approximations of differentiable and analytic functions},
     journal = {Doklady Akademii Nauk},
     pages = {418--420},
     publisher = {mathdoc},
     volume = {119},
     number = {3},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_3_a3/}
}