@article{MAN_1927__97_182635,
     author = {G.H. Hardy and J.E. Littlewood},
     title = {Some new properties of {Fourier} constants},
     journal = {Mathematische Annalen},
     pages = {159--209},
     publisher = {mathdoc},
     volume = {97},
     year = {1927},
     zbl = {52.0267.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1927__97_182635/}
}