%0 Journal Article
%A V. A. Skvortsov
%T Approximate symmetric variation and the Lusin $N$-property
%J Izvestiya. Mathematics 
%D 1997
%P 831-841
%V 61
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1997_61_4_a7/
%G en
%F IM2_1997_61_4_a7