%0 Journal Article %A Kh. P. Rustamov %T On differential-smoothness properties of functions in the space %J Doklady Akademii Nauk %D 1989 %P 46-51 %V 306 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_306_1_a9/ %G ru %F DAN_1989_306_1_a9