%0 Journal Article %A A. Lasota %A James A. Yorke %T Oscillatory solutions of second order ordinary differential equations %J Annales Polonici Mathematici %D 1971 %P 175-178 %V 25 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-25-2-175-178/ %R 10.4064/ap-25-2-175-178 %G en %F 10_4064_ap_25_2_175_178