%0 Journal Article %A Shen, Ying %A Zhang, Jihui %T Multiplicity of positive solutions for a Navier boundary-value problem involving the $p$-biharmonic with critical exponent %J Electronic Journal of Differential Equations %D 2011 %V 2011 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a62/ %G en %F EJDE_2011__2011__a62