@article{01393074, title = {The barrier cone of a convex set and the closure of the cover.}, journal = {Journal of Convex Analysis}, volume = {6}, year = {1999}, pages = {395-398}, zbl = {0954.52004}, language = {en}, url = {http://dml.mathdoc.fr/item/01393074} }
Bair, J.; Dupin, J.C. The barrier cone of a convex set and the closure of the cover.. Journal of Convex Analysis, Tome 6 (1999) pp. 395-398. http://gdmltest.u-ga.fr/item/01393074/