@article{PIM_1982_N_S_32_46_a22,
     author = {J. Schinas and A. Meimaridou},
     title = {Some {Perturbation} {Results} {On} {Multivalued} {Difference} {Equations}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {143 },
     publisher = {mathdoc},
     volume = {_N_S_32},
     number = {46},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_32_46_a22/}
}