Multiple solutions of p-Laplace type equations

The aim of this paper is stating some existence and multiplicity results for critical points of the family of functionals which can be written as \[ J(u) = \int_\Omega A(x,u)|\nabla u|^p dx - \int_\Omega G(x,u) dx \] in the Banach space $X = W^{1,p}_0(\Omega)\cap L^\infty(\Omega)$, being $\Omega$ a bounded domain in $\R^N$.\\ Proven a suitable variant of condition $(C)$, a modified version of ``classical'' linking theorems apply by making use of a ``good'' decomposition of $W^{1,p}_0(\Omega)$ in a sequence of finite dimensional subspaces.