@article{1077469836, author = {Duffin, R. J.}, title = {Orthogonal saw-tooth functions}, journal = {Duke Math. J.}, volume = {28}, number = {1}, year = {1961}, pages = { 559-561}, language = {en}, url = {http://dml.mathdoc.fr/item/1077469836} }
Duffin, R. J. Orthogonal saw-tooth functions. Duke Math. J., Tome 28 (1961) no. 1, pp. 559-561. http://gdmltest.u-ga.fr/item/1077469836/