@article{GDZPPN002370441,
title = {A convergence criterion for Fourier series},
journal = {Mathematische Zeitschrift},
volume = {28},
year = {1928},
pages = {612-634},
zbl = {54.0301.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002370441}
}
Hardy, G. H., und J.; J. E. Littlewood. A convergence criterion for Fourier series. Mathematische Zeitschrift, Tome 28 (1928) pp. 612-634. http://gdmltest.u-ga.fr/item/GDZPPN002370441/