@article{RSMUP_1956__25__214_0, author = {Hille, Einar}, title = {On a class of orthonormal functions}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {26}, year = {1956}, pages = {214-249}, mrnumber = {86974}, zbl = {0071.30201}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1956__25__214_0} }
Hille, Einar. On a class of orthonormal functions. Rendiconti del Seminario Matematico della Università di Padova, Tome 26 (1956) pp. 214-249. http://gdmltest.u-ga.fr/item/RSMUP_1956__25__214_0/
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