%0 Journal Article
%A È. Muhamadiev
%T On the theory of periodic solutions of systems of ordinary differential equations
%J Doklady Akademii Nauk
%D 1970
%P 510-513
%V 194
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1970_194_3_a7/
%G ru
%F DAN_1970_194_3_a7