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@article{MZ_1964__85_170315, author = {Raymond E. Pippert}, title = {On absolutely convergent trigonometric series.}, journal = {Mathematische Zeitschrift}, pages = {401--406}, publisher = {mathdoc}, volume = {85}, year = {1964}, zbl = {0131.06705}, url = {http://geodesic.mathdoc.fr/item/MZ_1964__85_170315/} }
Raymond E. Pippert. On absolutely convergent trigonometric series.. Mathematische Zeitschrift, Tome 85 (1964), pp. 401-406. http://geodesic.mathdoc.fr/item/MZ_1964__85_170315/