@article{BUMI_2005_8_8B_2_a8,
     author = {Tom\'as, M. S.},
     title = {Circumcenters in real normed spaces},
     journal = {Bollettino della Unione matematica italiana},
     pages = {421--430},
     publisher = {mathdoc},
     volume = {Ser. 8, 8B},
     number = {2},
     year = {2005},
     zbl = {1150.46010},
     mrnumber = {1421858},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2005_8_8B_2_a8/}
}