Sign changing solutions for quasilinear superlinear elliptic problems
  Results on existence and multiplicity of solutions for a nonlinear elliptic problem driven by the $\Phi$-Laplace operator are established. We employ minimization arguments on suitable Nehari manifolds to build a negative and a positive ground state solutions. In order to find a nodal solution we employ additionally the well known Deformation Lemma and Topological Degree Theory. 
E. D. Silva, M. L. M. Carvalho, F. J. S. A. Corr\^ea, Jose V. A.   Goncalves
math.AP