@article{GDZPPN002198878,
title = {Cuspidal newforms and character twists.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {329},
year = {1981},
pages = {58-71},
zbl = {0455.10016},
url = {http://dml.mathdoc.fr/item/GDZPPN002198878}
}
Shemanske, Thomas. Cuspidal newforms and character twists.. Journal für die reine und angewandte Mathematik, Tome 329 (1981) pp. 58-71. http://gdmltest.u-ga.fr/item/GDZPPN002198878/