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@article{MAN_1961__142_160831, author = {P.L. Butzer}, title = {On {Some} {Theorems} of {Hardy,} {Littlewood} and {Titchmarsh.}}, journal = {Mathematische Annalen}, pages = {259--269}, publisher = {mathdoc}, volume = {142}, year = {1961}, zbl = {0133.06302}, url = {http://geodesic.mathdoc.fr/item/MAN_1961__142_160831/} }
P.L. Butzer. On Some Theorems of Hardy, Littlewood and Titchmarsh.. Mathematische Annalen, Tome 142 (1961), pp. 259-269. http://geodesic.mathdoc.fr/item/MAN_1961__142_160831/