@article{EJDE_2007__2007__a77,
     author = {Khafagy, Salah A. and Serag, Hassan M.},
     title = {Maximum principle and existence of positive solutions for nonlinear systems involving degenerate $p${-Laplacian} operators},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2007},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a77/}
}