%0 Journal Article
%A M. T. Terekhin
%A N. V. Retyunskikh
%T Periodic Solutions of Nonlinear Nonautonomous Systems of Ordinary Differential Equations
%J Differencialʹnye uravneniâ
%D 2001
%P 566-569
%V 37
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2001_37_4_a16/
%G ru
%F DE_2001_37_4_a16