%0 Journal Article %A A. N. Zhdanov %A E. A. Sevast'yanov %T Approximation and differential properties of measurable sets %J Sbornik. Mathematics %D 1984 %P 401-418 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_49_2_a7/ %G en %F SM_1984_49_2_a7