%0 Journal Article
%A V. I. Rozhkov
%T A certain method of investigating the periodic solutions of systems with a small parameter multiplying the derivatives
%J Differencialʹnye uravneniâ
%D 1975
%P 1388-1395
%V 11
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1975_11_8_a4/
%G ru
%F DE_1975_11_8_a4