%0 Journal Article
%A O. A. Ivanov
%T Necessity of Gomory's conditions for the existence of periodic solutions of two-dimensional quasihomogeneous systems
%J Differencialʹnye uravneniâ
%D 1985
%P 191-198
%V 21
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1985_21_2_a1/
%G ru
%F DE_1985_21_2_a1