@article{JCA_1998_5_2_a9,
     author = {A. Gavioli},
     title = {A {Viability} {Result} in the {Upper} {Semicontinuous} {Case}},
     journal = {Journal of convex analysis},
     pages = {381--396},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/JCA_1998_5_2_a9/}
}