%0 Journal Article
%A Karim, Rahmi Ibrahim Ibrahim Abdel
%T Note on the periodic solutions of systems of ordinary differential equations
%J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
%D 1972
%P 7-14
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AUPO_1972__12_1_a0/
%G en
%F AUPO_1972__12_1_a0