@article{1077375085,
author = {Libera, Richard J.},
title = {Some radius of convexity problems},
journal = {Duke Math. J.},
volume = {31},
number = {1},
year = {1964},
pages = { 143-158},
language = {en},
url = {http://dml.mathdoc.fr/item/1077375085}
}
Libera, Richard J. Some radius of convexity problems. Duke Math. J., Tome 31 (1964) no. 1, pp. 143-158. http://gdmltest.u-ga.fr/item/1077375085/