%0 Journal Article
%A J. W. Heidel
%T Addenda to "Periodic solutions of $x" + f(x)x'^{2n} + g(x) = 0$ with arbitrarily large period''
%J Annales Polonici Mathematici
%D 1972
%P 163-165
%V 27
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-27-2-163-165/
%R 10.4064/ap-27-2-163-165
%G en
%F 10_4064_ap_27_2_163_165