%0 Journal Article %A Dinca, George %A Matei, Pavel %T Variational and topological methods for operator equations involving duality mappings on Orlicz-Sobolev spaces %J Electronic journal of differential equations %D 2007 %V 2007 %U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a70/ %G en %F EJDE_2007__2007__a70