%0 Journal Article %A Regenda, Ján %T A note on oscillation and nonoscillation criteria for fourth order linear differential equations %J Mathematica slovaca %D 1983 %P 297-302 %V 33 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1983__33_3_a5/ %G en %F MASLO_1983__33_3_a5