%0 Journal Article %A Khafagy, Salah A. %A Serag, Hassan M. %T Maximum principle and existence of positive solutions for nonlinear systems involving degenerate $p$-Laplacian operators %J Electronic Journal of Differential Equations %D 2007 %V 2007 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a177/ %G en %F EJDE_2007__2007__a177