%0 Journal Article %A Mâagli, Habib %A Toumi, Faten %A Zribi, Malek %T Existence of positive solutions for some polyharmonic nonlinear boundary-value problems %J Electronic Journal of Differential Equations %D 2003 %V 2003 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a70/ %G en %F EJDE_2003__2003__a70