%0 Journal Article
%A Serag, Hassan M.
%A El-Zahrani, Eada A.
%T Maximum principle and existence of positive solutions for nonlinear systems on $\Bbb R^N$
%J Electronic Journal of Differential Equations
%D 2005
%V 2005
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2005__2005__a4/
%G en
%F EJDE_2005__2005__a4