@article{JCA_1996_3_2_a0,
     author = {A. Corbo Esposito and R. De Arcangelis},
     title = {A {Characterization} of {Sets} of {Functions} and {Distributions} on {R\protect\textsuperscript{N}} {Described} by {Constraints} on the {Gradient}},
     journal = {Journal of convex analysis},
     pages = {167--194},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1996},
     url = {http://geodesic.mathdoc.fr/item/JCA_1996_3_2_a0/}
}