%0 Journal Article
%A Bularas Driss
%A M. N. Popa
%T Concomitants of a system with quadratic nonlinearities
%J Differencialʹnye uravneniâ
%D 1978
%P 835-842
%V 14
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_5_a6/
%G ru
%F DE_1978_14_5_a6