@article{01130732, title = {Proto-derivatives of partial subgradient mappings.}, journal = {Journal of Convex Analysis}, volume = {4}, year = {1997}, pages = {221-234}, zbl = {0897.49013}, language = {en}, url = {http://dml.mathdoc.fr/item/01130732} }
Poliquin, R.A.; Rockafellar, R.T. Proto-derivatives of partial subgradient mappings.. Journal of Convex Analysis, Tome 4 (1997) pp. 221-234. http://gdmltest.u-ga.fr/item/01130732/