@article{MAN_1983__263_163741,
     author = {R.A. Rankin},
     title = {Sums of {Powers} of {Cusp} {Form} {Coefficients.}},
     journal = {Mathematische Annalen},
     pages = {227--236},
     publisher = {mathdoc},
     volume = {263},
     year = {1983},
     zbl = {0492.10020},
     url = {http://geodesic.mathdoc.fr/item/MAN_1983__263_163741/}
}