%0 Journal Article %A V. P. Il'in %T On some properties of classes of differentiable functions defined in a~domain %J Informatics and Automation %D 1965 %P 93-143 %V 84 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1965_84_a7/ %G ru %F TRSPY_1965_84_a7