%0 Journal Article %A Witold Kosmala %T Oscillation of a forced higher order equation %J Annales Polonici Mathematici %D 1994 %P 137-144 %V 60 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-60-2-137-144/ %R 10.4064/ap-60-2-137-144 %G en %F 10_4064_ap_60_2_137_144