%0 Journal Article
%A Yu. V. Malyshev
%A V. P. Zakharov
%T Integrating factors and limit cycles
%J Differencialʹnye uravneniâ
%D 1990
%P 542-544
%V 26
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_3_a28/
%G ru
%F DE_1990_26_3_a28