%0 Journal Article %A Klaudiusz Wójcik %T Chaos in some planar nonautonomous polynomial differential equation %J Annales Polonici Mathematici %D 2000 %P 159-168 %V 73 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-73-2-159-168/ %R 10.4064/ap-73-2-159-168 %G en %F 10_4064_ap_73_2_159_168