@article{EJDE_2009__2009__a92,
     author = {Cui,  Yujun and Zou,  Yumei},
     title = {Existence and uniqueness of solutions for fourth-order boundary-value problems in {Banach} spaces},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1191.34079},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a92/}
}