%0 Journal Article
%A L. A. Cherkas
%T Stability of a singular cycle in the critical case
%J Differencialʹnye uravneniâ
%D 1967
%P 1060-1069
%V 3
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1967_3_7_a2/
%G ru
%F DE_1967_3_7_a2