%0 Journal Article %A Greguš, M. %T On a perturbed nonlinear third order differential equation %J Archivum mathematicum %D 1997 %P 121-126 %V 33 %N 1-2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1997__33_1-2_a12/ %G en %F ARM_1997__33_1-2_a12