%0 Journal Article
%A L. A. Cherkas
%A I. S. Shchukina
%T On series expansion of an Andronov--Hopf manifold of a quadratic system in the plane
%J Differencialʹnye uravneniâ
%D 1987
%P 278-282
%V 23
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_2_a10/
%G ru
%F DE_1987_23_2_a10