%0 Journal Article
%A V. N. Laptinskii
%T On the question of the construction of periodic solutions of nonautonomous differential equations
%J Differencialʹnye uravneniâ
%D 1983
%P 1335-1343
%V 19
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1983_19_8_a5/
%G ru
%F DE_1983_19_8_a5