@article{GDZPPN002373335,
title = {An additional note on Parseval's Theorem},
journal = {Mathematische Zeitschrift},
volume = {34},
year = {1932},
pages = {634-636},
zbl = {0003.20303},
url = {http://dml.mathdoc.fr/item/GDZPPN002373335}
}
Littlewood, J. E., and G. H. Hardy,. An additional note on Parseval's Theorem. Mathematische Zeitschrift, Tome 34 (1932) pp. 634-636. http://gdmltest.u-ga.fr/item/GDZPPN002373335/