@article{106307,
author = {Josef Dane\v s},
title = {On the radius of a set in a Hilbert space},
journal = {Commentationes Mathematicae Universitatis Carolinae},
volume = {025},
year = {1984},
pages = {355-362},
zbl = {0568.46018},
mrnumber = {768823},
language = {en},
url = {http://dml.mathdoc.fr/item/106307}
}
Daneš, Josef. On the radius of a set in a Hilbert space. Commentationes Mathematicae Universitatis Carolinae, Tome 025 (1984) pp. 355-362. http://gdmltest.u-ga.fr/item/106307/
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