%0 Journal Article
%A S. Sędziwy
%T On periodic solutions of a certain third-order non-linear differential equation
%J Annales Polonici Mathematici
%D 1965
%P 147-154
%V 17
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-17-2-147-154/
%R 10.4064/ap-17-2-147-154
%G en
%F 10_4064_ap_17_2_147_154