TY - JOUR AU - O. V. Besov TI - Extension of functions with preservation of differential-difference properties in $L_p$ JO - Doklady Akademii Nauk PY - 1963 SP - 963 EP - 966 VL - 150 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a1/ LA - ru ID - DAN_1963_150_5_a1 ER -