@article{JCA_1999_6_1_JCA_1999_6_1_a0,
     author = {J. E. Martinez-Legaz and P. H. Sach},
     title = {A {New} {Subdifferential} in {Quasiconvex} {Analysis}},
     journal = {Journal of convex analysis},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/JCA_1999_6_1_JCA_1999_6_1_a0/}
}