@article{01332094,
title = {Generalized centers of finite sets in Banach spaces.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {66},
year = {1997},
pages = {83-115},
zbl = {0922.41019},
language = {en},
url = {http://dml.mathdoc.fr/item/01332094}
}
Veselý, L. Generalized centers of finite sets in Banach spaces.. Acta Mathematica Universitatis Comenianae. New Series, Tome 66 (1997) pp. 83-115. http://gdmltest.u-ga.fr/item/01332094/