@article{1077489653,
author = {Astrachan, Max},
title = {Studies in the summability of Fourier series by N\"orlund means},
journal = {Duke Math. J.},
volume = {2},
number = {1},
year = {1936},
pages = { 543-568},
language = {en},
url = {http://dml.mathdoc.fr/item/1077489653}
}
Astrachan, Max. Studies in the summability of Fourier series by Nörlund means. Duke Math. J., Tome 2 (1936) no. 1, pp. 543-568. http://gdmltest.u-ga.fr/item/1077489653/