On a class of orthonormal functions
Rendiconti del Seminario Matematico della Università di Padova, Volume 25 (1956), p. 214-249
@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},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {25},
     year = {1956},
     pages = {214-249},
     zbl = {0071.30201},
     mrnumber = {86974},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1956__25__214_0}
}
Hille, Einar. On a class of orthonormal functions. Rendiconti del Seminario Matematico della Università di Padova, Volume 25 (1956) pp. 214-249. http://www.numdam.org/item/RSMUP_1956__25__214_0/

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