%0 Journal Article
%A V. P. Skripnik
%T Degenerate systems and a small parameter at the derivative
%J Differencialʹnye uravneniâ
%D 1968
%P 646-658
%V 4
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_4_a7/
%G ru
%F DE_1968_4_4_a7