@article{00823375,
title = {Proximal smoothness and the lower-},
journal = {Journal of Convex Analysis},
volume = {2},
year = {1995},
pages = {117-144},
zbl = {0881.49008},
language = {en},
url = {http://dml.mathdoc.fr/item/00823375}
}
Clarke, F.H.; Stern, R.J.; Wolenski, P.R. Proximal smoothness and the lower-. Journal of Convex Analysis, Tome 2 (1995) pp. 117-144. http://gdmltest.u-ga.fr/item/00823375/