TY - JOUR AU - Shapour Heidarkhani AU - Yu Tian AU - Chun-Lei Tang TI - Existence of three solutions for a class of $(p_1,\ldots,p_n)$-biharmonic systems with Navier boundary conditions JO - Annales Polonici Mathematici PY - 2012 SP - 261 EP - 277 VL - 104 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap104-3-4/ DO - 10.4064/ap104-3-4 LA - en ID - 10_4064_ap104_3_4 ER -