%0 Journal Article %A Manfrin, Renato %T A note on linear perturbations of oscillatory second order differential equations %J Archivum mathematicum %D 2010 %P 105-118 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_2010__46_2_a3/ %G en %F ARM_2010__46_2_a3