%0 Journal Article
%A M. S. Nikol'skii
%T A piecewise constant integral for multivalued mappings
%J Differencialʹnye uravneniâ
%D 1987
%P 1705-1710
%V 23
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_10_a5/
%G ru
%F DE_1987_23_10_a5