@article{1077493233, author = {Hartman, Philip}, title = {The divergence of non-harmonic gap series}, journal = {Duke Math. J.}, volume = {9}, number = {1}, year = {1942}, pages = { 404-405}, language = {en}, url = {http://dml.mathdoc.fr/item/1077493233} }
Hartman, Philip. The divergence of non-harmonic gap series. Duke Math. J., Tome 9 (1942) no. 1, pp. 404-405. http://gdmltest.u-ga.fr/item/1077493233/