%0 Journal Article
%A N. N. Butenina
%T Multiple merging of separatrices and limit cycles
%J Differencialʹnye uravneniâ
%D 1981
%P 732-734
%V 17
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1981_17_4_a17/
%G ru
%F DE_1981_17_4_a17