@article{JCA_2000_7_2_JCA_2000_7_2_a1,
     author = {J.-P. Penot and C. Zalinescu},
     title = {Elements of {Quasiconvex} {Subdifferential} {Calculus}},
     journal = {Journal of convex analysis},
     pages = {243--27},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2000},
     url = {http://geodesic.mathdoc.fr/item/JCA_2000_7_2_JCA_2000_7_2_a1/}
}