%0 Journal Article %A Šoltés, Pavel %T A remark on the oscillatory behavior of solutions of differential equations of order 3 and 4 %J Archivum mathematicum %D 1973 %P 115-118 %V 09 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1973__9_3_a2/ %G en %F ARM_1973__9_3_a2