%0 Journal Article
%A E. E. Barbashina
%T Necessary conditions with matrix impulses for a Goursat--Darboux system
%J Differencialʹnye uravneniâ
%D 1990
%P 342-343
%V 26
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_2_a19/
%G ru
%F DE_1990_26_2_a19