%0 Journal Article
%A L. A. Cherkas
%A I. L. Shevtsov
%T On the Coppel Problem for Quadratic Systems with a Fine Focus
%J Differencialʹnye uravneniâ
%D 2005
%P 1100-1104
%V 41
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2005_41_8_a10/
%G ru
%F DE_2005_41_8_a10