@article{EJDE_2009__2009__a70,
     author = {Zaidi,  Atiya H.},
     title = {Existence of solutions and convergence results for dynamic initial value problems using lower and upper solutions},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1188.34121},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a70/}
}