@article{MS2_1972__30_166223,
     author = {Michel Valadier},
     title = {Sous-Diff\'erentiabilit\'e de fonctions convexes \`a valeurs dans un espace vectoriel ordonn\'e.},
     journal = {Mathematica Scandinavica},
     pages = {65--74},
     publisher = {mathdoc},
     volume = {30},
     year = {1972},
     zbl = {0239.46038},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__30_166223/}
}