@article{2111,
author = {Bohnenblust, Frederic},
title = {A characterization of complex Hilbert spaces},
journal = {Portugaliae mathematica},
volume = {3},
year = {1942},
pages = {103-109},
zbl = {0026.32403},
mrnumber = {0008117},
language = {en},
url = {http://dml.mathdoc.fr/item/2111}
}
Bohnenblust, Frederic. A characterization of complex Hilbert spaces. Portugaliae mathematica, Tome 3 (1942) pp. 103-109. http://gdmltest.u-ga.fr/item/2111/