@article{DAN_1965_162_2_a12,
     author = {N. I. Chernykh},
     title = {The approximation of functions by polynomials with constraints},
     journal = {Doklady Akademii Nauk},
     pages = {290--293},
     publisher = {mathdoc},
     volume = {162},
     number = {2},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_162_2_a12/}
}