@article{10_1007_s10587_014_0098_5,
     author = {Gadiyar, H. Gopalakrishna and Padma, Ramanathan},
     title = {Ramanujan-Fourier series and the conjecture {D} of {Hardy} and {Littlewood}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {251--267},
     publisher = {mathdoc},
     volume = {64},
     number = {1},
     year = {2014},
     doi = {10.1007/s10587-014-0098-5},
     mrnumber = {3247459},
     zbl = {06391491},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-014-0098-5/}
}