@article{EJDE_2013__2013__a143,
     author = {Sang, Yanbin},
     title = {Existence and uniqueness of fixed points for mixed monotone operators with perturbations},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2013},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a143/}
}