@article{JCA_2013_20_1_JCA_2013_20_1_a12,
     author = {T. Precupanu},
     title = {Characterizations of {Pointwise} {Additivity} of {Subdifferential}},
     journal = {Journal of convex analysis},
     pages = {221--231},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/JCA_2013_20_1_JCA_2013_20_1_a12/}
}