%0 Journal Article %A PalumbĂ­ny, Oleg %T On oscillation criteria of fourth order linear differential equations %J Czechoslovak Mathematical Journal %D 2003 %P 467-477 %V 53 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2003__53_2_a19/ %G en %F CMJ_2003__53_2_a19