TY - JOUR AU - O. V. Besov TI - On the density of finitary functions and the extension of classes of differentiable functions JO - Doklady Akademii Nauk PY - 1965 SP - 738 EP - 741 VL - 165 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1965_165_4_a1/ LA - ru ID - DAN_1965_165_4_a1 ER -