TY - JOUR AU - Hernández, Eduardo TI - Existence of solutions for an abstract second-order differential equation with nonlocal conditions JO - Electronic Journal of Differential Equations PY - 2009 VL - 2009 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a138/ LA - en ID - EJDE_2009__2009__a138 ER -