@article{1195524955,
author = {Is\'eki, Kiyoshi},
title = {On complete orthonormal sets in Hilbert space},
journal = {Proc. Japan Acad.},
volume = {33},
number = {10},
year = {1957},
pages = { 450-452},
language = {en},
url = {http://dml.mathdoc.fr/item/1195524955}
}
Iséki, Kiyoshi. On complete orthonormal sets in Hilbert space. Proc. Japan Acad., Tome 33 (1957) no. 10, pp. 450-452. http://gdmltest.u-ga.fr/item/1195524955/