@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/