@article{GDZPPN002382652,
title = {Note on a Theorem of Banach.},
journal = {Mathematische Zeitschrift},
volume = {55},
year = {1951},
pages = {308-309},
zbl = {0047.28505},
url = {http://dml.mathdoc.fr/item/GDZPPN002382652}
}
Fan, Ky. Note on a Theorem of Banach.. Mathematische Zeitschrift, Tome 55 (1951) pp. 308-309. http://gdmltest.u-ga.fr/item/GDZPPN002382652/