%0 Journal Article %A O. V. Besov %T Extension of functions with preservation of differential-difference properties in $L_p$ %J Doklady Akademii Nauk %D 1963 %P 963-966 %V 150 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a1/ %G ru %F DAN_1963_150_5_a1