@article{EJDE_2009__2009__a41,
     author = {Moussaoui, Toufik and Precup, Radu},
     title = {Existence of solutions for second-order differential equations and systems on infinite intervals},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2009},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a41/}
}