%0 Journal Article %A Šoltés, Pavel %T Oscillation of solutions of a non-linear delay differential equation of the fourth order %J Archivum mathematicum %D 1978 %P 175-180 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1978__14_3_a6/ %G en %F ARM_1978__14_3_a6