@article{DAN_1994_338_6_a5,
     author = {I. G. Tsar'kov},
     title = {Extension theorems and approximation of functions in {Banach}},
     journal = {Doklady Akademii Nauk},
     pages = {740--741},
     publisher = {mathdoc},
     volume = {338},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_338_6_a5/}
}