@article{GDZPPN002400537,
title = {Fourier Coefficients of Positive Functions.},
journal = {Mathematische Zeitschrift},
volume = {99},
year = {1967},
pages = {373-379},
zbl = {0175.06303},
url = {http://dml.mathdoc.fr/item/GDZPPN002400537}
}
Askey, R.; Boas, R.P. jr. Fourier Coefficients of Positive Functions.. Mathematische Zeitschrift, Tome 99 (1967) pp. 373-379. http://gdmltest.u-ga.fr/item/GDZPPN002400537/