@article{JCA_2018_25_3_JCA_2018_25_3_a12,
     author = {M. C. Delfour},
     title = {Topological {Derivative:} a {Semidifferential} via the {Minkowski} {Content}},
     journal = {Journal of convex analysis},
     pages = {957--982},
     year = {2018},
     volume = {25},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JCA_2018_25_3_JCA_2018_25_3_a12/}
}