TY - JOUR AU - Hai, Dang Dinhr TI - Positive solutions for a class of singular boundary value problems JO - Electronic journal of differential equations PY - 2006 VL - 2006 UR - http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a63/ LA - en ID - EJDE_2006__2006__a63 ER -