@article{DAN_1964_156_5_a3,
     author = {A. G. Vitushkin},
     title = {Some properties of linear superpositions of smooth functions},
     journal = {Doklady Akademii Nauk},
     pages = {1003--1006},
     publisher = {mathdoc},
     volume = {156},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_5_a3/}
}