@article{GDZPPN002367599,
title = {Hardy, G. H., and J. E. Littlewood, Solution of the
Ces\`aro summability problem for power-series and Fourier series},
journal = {Mathematische Zeitschrift},
volume = {20},
year = {1924},
pages = {67-96},
zbl = {49.0232.01},
url = {http://dml.mathdoc.fr/item/GDZPPN002367599}
}
(éd.). Hardy, G. H., and J. E. Littlewood, Solution of the
Cesàro summability problem for power-series and Fourier series. Mathematische Zeitschrift, Tome 20 (1924) pp. 67-96. http://gdmltest.u-ga.fr/item/GDZPPN002367599/