@article{MS2_1968__23_166065, author = {T. Hjelle and T. Klove}, title = {Congruence {Properties} and {Density} {Problems} for the {Fourier} {Coefficients} of {Modular} {Forms.}}, journal = {Mathematica Scandinavica}, pages = {160--166}, publisher = {mathdoc}, volume = {23}, year = {1968}, zbl = {0184.07401}, url = {http://geodesic.mathdoc.fr/item/MS2_1968__23_166065/} }