%0 Journal Article
%A A. K. Demenchuk
%T Periodic solutions of differential systems whose period is incommensurable with the period of the system itself
%J Differencialʹnye uravneniâ
%D 1990
%P 2167-2170
%V 26
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_12_a19/
%G ru
%F DE_1990_26_12_a19