@article{1103044608, author = {Fine, N. J.}, title = {On groups of orthonormal functions. II.}, journal = {Pacific J. Math.}, volume = {5}, number = {4}, year = {1955}, pages = { 61-65}, language = {en}, url = {http://dml.mathdoc.fr/item/1103044608} }
Fine, N. J. On groups of orthonormal functions. II.. Pacific J. Math., Tome 5 (1955) no. 4, pp. 61-65. http://gdmltest.u-ga.fr/item/1103044608/