@article{1183503899,
author = {Blumenthal, L. M. and Wahlin, G. E.},
title = {On the spherical surface of smallest radius enclosing a bounded subset of $n$-dimensional euclidean space},
journal = {Bull. Amer. Math. Soc.},
volume = {47},
number = {11},
year = {1941},
pages = { 771-777},
language = {en},
url = {http://dml.mathdoc.fr/item/1183503899}
}
Blumenthal, L. M.; Wahlin, G. E. On the spherical surface of smallest radius enclosing a bounded subset of $n$-dimensional euclidean space. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 771-777. http://gdmltest.u-ga.fr/item/1183503899/