%0 Journal Article %A Došlý, Ondřej %T Oscillatory properties of fourth order Sturm-Liouville differential equations %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 2002 %P 55-65 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_2002__41_1_a6/ %G en %F AUPO_2002__41_1_a6