%0 Journal Article
%A I. T. Kiguradze
%T On the periodic solutions of a system of ordinary differential equations with singularities
%J Doklady Akademii Nauk
%D 1971
%P 286-289
%V 198
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_198_2_a7/
%G ru
%F DAN_1971_198_2_a7