@article{AM2_1997__53_1-2_137681,
     author = {K. Nikodem and F., Vercillo, S. Papalini},
     title = {Some representations of midconvex set-valued functions.},
     journal = {Aequationes mathematicae},
     pages = {127--140},
     publisher = {mathdoc},
     volume = {53},
     number = {1-2},
     year = {1997},
     zbl = {0872.26008},
     url = {http://geodesic.mathdoc.fr/item/AM2_1997__53_1-2_137681/}
}