%0 Journal Article %A Tadie %T Comparison results for semilinear elliptic equations via Picone-type identities %J Electronic Journal of Differential Equations %D 2009 %V 2009 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a139/ %G en %F EJDE_2009__2009__a139