@article{EJDE_2007__2007__a49,
     author = {Omeike,  Mathew O.},
     title = {Boundedness of solutions to fourth-order differential equation with oscillatory restoring and forcing terms},
     journal = {Electronic journal of differential equations},
     year = {2007},
     volume = {2007},
     zbl = {1141.34320},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a49/}
}