@article{GDZPPN002446022, title = {\"Uber positive Fourier-Integrale}, journal = {Mathematische Zeitschrift}, volume = {16}, year = {1923}, pages = {103-125}, zbl = {49.0207.03}, url = {http://dml.mathdoc.fr/item/GDZPPN002446022} }
Mathias, M. Über positive Fourier-Integrale. Mathematische Zeitschrift, Tome 16 (1923) pp. 103-125. http://gdmltest.u-ga.fr/item/GDZPPN002446022/