@article{MAN_1973__206_162514,
     author = {Michio Ozeki},
     title = {On {Modular} {Forms} whose {Fourier} {Coefficients} are {Non-Negative} {Integers} with the {Constant} {Term}  {Unity.}},
     journal = {Mathematische Annalen},
     pages = {187--204},
     publisher = {mathdoc},
     volume = {206},
     year = {1973},
     zbl = {0266.10021},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__206_162514/}
}