@article{DAN_1962_143_4_a4,
     author = {E. P. Dolzhenko},
     title = {On approximation on closed regions and on null-sets},
     journal = {Doklady Akademii Nauk},
     pages = {771--774},
     publisher = {mathdoc},
     volume = {143},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_143_4_a4/}
}