@article{EJDE_2009__2009__a38,
     author = {Hern\'andez,  Eduardo},
     title = {Existence of solutions for an abstract second-order differential equation with nonlocal conditions},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1180.35537},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a38/}
}