@article{JCA_2014_21_2_JCA_2014_21_2_a6,
     author = {M. Valadier},
     title = {Differentiability of the {"Positive} {Part"} {Map}},
     journal = {Journal of convex analysis},
     pages = {449--452},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/JCA_2014_21_2_JCA_2014_21_2_a6/}
}