%0 Journal Article %T Existence of solutions for a boundary problem involving p(x)-biharmonic operator %A Abdel Rachid El Amrouss %A Anass Ourraoui %J Boletim da Sociedade Paranaense de Matem¨¢tica %D 2013 %I Sociedade Brasileira de Matem¨¢tica %X n this paper, we establish the existence of at least three solutions to a boundary problem involving the p(x)-biharmonic operator. Our technical approach is based on theorem obtained by B. Ricceri's variational principale and local mountain pass theorem without (Palais.Smale) condition. %K p(x)-biharmonic %K neumann problem %K variational methods. %U http://www.periodicos.uem.br/ojs/index.php/BSocParanMat/article/view/15148