%0 Journal Article %A Le, Vy Khoi %A Schmitt, Klaus %T Sub-supersolution theorems for quasilinear elliptic problems: A variational approach %J Electronic Journal of Differential Equations %D 2004 %V 2004 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a97/ %G en %F EJDE_2004__2004__a97