@article{EJDE_2011__2011__a37,
     author = {Turki, Sameh},
     title = {Existence of continuous positive solutions for some nonlinear polyharmonic systems outside the unit ball},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2011},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a37/}
}