TY - JOUR AU - Nguyen Thanh Chung TI - Existence of infinitely many solutions for degenerate and singular elliptic systems with indefinite concave nonlinearities JO - Electronic journal of differential equations PY - 2011 VL - 2011 UR - http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a9/ LA - en ID - EJDE_2011__2011__a9 ER -