  We study a nonlinear parametric Neumann problem driven by a nonhomogeneous
quasilinear elliptic differential operator $\operatorname{div}(a(x,\nabla u))$,
a special case of which is the $p$-Laplacian. The reaction term is a
nonlinearity function $f$ which exhibits $(p-1)$-subcritical growth. By using
variational methods, we prove a multiplicity result on the existence of weak
solutions for such problems. An explicit example of an application is also
presented.
