@article{1195523111, author = {Urata, Yosihiro}, title = {A theorem of Bari on the completeness of orthonormal systems}, journal = {Proc. Japan Acad.}, volume = {39}, number = {9}, year = {1963}, pages = { 160-161}, language = {en}, url = {http://dml.mathdoc.fr/item/1195523111} }
Urata, Yosihiro. A theorem of Bari on the completeness of orthonormal systems. Proc. Japan Acad., Tome 39 (1963) no. 9, pp. 160-161. http://gdmltest.u-ga.fr/item/1195523111/