%0 Journal Article %A D. Willett %T On the oscillation of ty" + p(t)y = 0 with ʃ p almost periodic %J Annales Polonici Mathematici %D 1973 %P 335-339 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-28-3-335-339/ %R 10.4064/ap-28-3-335-339 %G en %F 10_4064_ap_28_3_335_339