%0 Journal Article
%A L. V. Detchenya
%A A. P. Sadovskii
%T Orbital normal forms of two-dimensional analytic systems with zero linear and nonzero quadratic parts
%J Differencialʹnye uravneniâ
%D 1999
%P 51-57
%V 35
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1999_35_1_a7/
%G ru
%F DE_1999_35_1_a7