%0 Journal Article %A V. G. Krotov %T On differentiability of functions in $L^p$ and $H^p$ for $0 %J Doklady Akademii Nauk %D 1981 %P 1311-1314 %V 256 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_256_6_a6/ %G ru %F DAN_1981_256_6_a6