@article{1077490032,
author = {Gergen, J. J.},
title = {Summability of double Fourier series},
journal = {Duke Math. J.},
volume = {3},
number = {1},
year = {1937},
pages = { 133-148},
language = {en},
url = {http://dml.mathdoc.fr/item/1077490032}
}
Gergen, J. J. Summability of double Fourier series. Duke Math. J., Tome 3 (1937) no. 1, pp. 133-148. http://gdmltest.u-ga.fr/item/1077490032/