@article{DAN_1965_160_4_a9,
     author = {V. M. Tikhomirov},
     title = {Some problems in approximation theory},
     journal = {Doklady Akademii Nauk},
     pages = {774--777},
     publisher = {mathdoc},
     volume = {160},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_160_4_a9/}
}