%0 Journal Article
%A V. A. Lunkevich
%A K. S. Sibirskii
%T Quadratic zero-systems of differential equations
%J Differencialʹnye uravneniâ
%D 1989
%P 1056-1058
%V 25
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_6_a24/
%G ru
%F DE_1989_25_6_a24