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@article{MZ_1932__34_168331, author = {J.E., and G. H. Hardy, Littlewood}, title = {Some new cases of {Parseval's} {Theorem}}, journal = {Mathematische Zeitschrift}, pages = {620--633}, publisher = {mathdoc}, volume = {34}, year = {1932}, zbl = {58.0274.03}, url = {http://geodesic.mathdoc.fr/item/MZ_1932__34_168331/} }
J.E., and G. H. Hardy, Littlewood. Some new cases of Parseval's Theorem. Mathematische Zeitschrift, Tome 34 (1932), pp. 620-633. http://geodesic.mathdoc.fr/item/MZ_1932__34_168331/