@article{MAN_1977__229_163017,
     author = {Goro Shimura},
     title = {On the {Periods} of {Modular} {Forms.}},
     journal = {Mathematische Annalen},
     pages = {211--222},
     publisher = {mathdoc},
     volume = {229},
     year = {1977},
     zbl = {0363.10019},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__229_163017/}
}