@article{1077474309,
author = {Hartman, Philip},
title = {Multiplicative sequences and T\"oplerian $(L^2)$ -bases},
journal = {Duke Math. J.},
volume = {14},
number = {1},
year = {1947},
pages = { 755-767},
language = {en},
url = {http://dml.mathdoc.fr/item/1077474309}
}
Hartman, Philip. Multiplicative sequences and Töplerian $(L^2)$ -bases. Duke Math. J., Tome 14 (1947) no. 1, pp. 755-767. http://gdmltest.u-ga.fr/item/1077474309/