TY - JOUR AU - Deng, Shengbing AU - Yang, Jianfu TI - Critical Neumann problem for nonlinear elliptic systems in exterior domains JO - Electronic Journal of Differential Equations PY - 2008 VL - 2008 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a98/ LA - en ID - EJDE_2008__2008__a98 ER -