TY - JOUR AU - S. P. Baiborodov TI - On the approximation of functions of several variables by de la Vallee Poussin rectangular sums JO - Doklady Akademii Nauk PY - 1979 SP - 265 EP - 267 VL - 249 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1979_249_2_a0/ LA - ru ID - DAN_1979_249_2_a0 ER -