@article{10_4153_CMB_1993_017_4,
     author = {Poliquin, R. A.},
     title = {A {Characterization} of {Proximal} {Subgradient} {Set-Valued} {Mappings}},
     journal = {Canadian mathematical bulletin},
     pages = {116--122},
     year = {1993},
     volume = {36},
     number = {1},
     doi = {10.4153/CMB-1993-017-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-017-4/}
}