%0 Journal Article
%A G. A. Leonov
%T A frequency criterion for the existence of limit cycles of dynamical systems with a cylindrical phase space
%J Differencialʹnye uravneniâ
%D 1987
%P 2047-2051
%V 23
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_12_a3/
%G ru
%F DE_1987_23_12_a3