@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/