%0 Journal Article
%A V. A. Lunkevich
%T The problem of the center for differential equations with discontinuous right-hand sides
%J Differencialʹnye uravneniâ
%D 1968
%P 1625-1639
%V 4
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_9_a7/
%G ru
%F DE_1968_4_9_a7