%0 Journal Article
%A T. I. Ananich
%T Nonlinear periodic systems with a linear Poincar\'e mapping
%J Differencialʹnye uravneniâ
%D 1991
%P 1443-1444
%V 27
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1991_27_8_a19/
%G ru
%F DE_1991_27_8_a19