@article{GDZPPN002106604,
title = {Nonvanishing of L-functions for GL(2).},
journal = {Inventiones mathematicae},
volume = {96},
year = {1989},
pages = {381-404},
zbl = {0677.10020},
url = {http://dml.mathdoc.fr/item/GDZPPN002106604}
}
Rohrlich, David E. Nonvanishing of L-functions for GL(2).. Inventiones mathematicae, Tome 96 (1989) pp. 381-404. http://gdmltest.u-ga.fr/item/GDZPPN002106604/