@article{PPN235181684_0097+dmdlog12, title = {Some new properties of Fourier constants}, journal = {Mathematische Annalen}, volume = {97}, year = {1927}, pages = {159-209}, zbl = {52.0267.01}, url = {http://dml.mathdoc.fr/item/PPN235181684_0097+dmdlog12} }
Hardy, G.H.; Littlewood, J.E. Some new properties of Fourier constants. Mathematische Annalen, Tome 97 (1927) pp. 159-209. http://gdmltest.u-ga.fr/item/PPN235181684_0097+dmdlog12/