@article{JRAM_1989__402_153185,
     author = {Toyokazu Hiramatsu},
     title = {On traces of {Hecke} operators on the space of cusp froms of weight 1.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {166--180},
     year = {1989},
     volume = {402},
     zbl = {0672.10022},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__402_153185/}
}