@article{JRAM_1932__167_149821,
     author = {G.H. Hardy and J.E. Littlewood},
     title = {Some properties of conjugate functions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {405--423},
     publisher = {mathdoc},
     volume = {167},
     year = {1932},
     zbl = {0003.20203},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1932__167_149821/}
}