Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MMO_1972_26_a0, author = {A. D. Ioffe and V. L. Levin}, title = {Subdifferentials of convex functions}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {3--73}, publisher = {mathdoc}, volume = {26}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1972_26_a0/} }
A. D. Ioffe; V. L. Levin. Subdifferentials of convex functions. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 26 (1972), pp. 3-73. http://geodesic.mathdoc.fr/item/MMO_1972_26_a0/