@article{GDZPPN002312581,
title = {Hecke Eigenforms of Degree Two: Dirichlet Series and Euler Products.},
journal = {Mathematische Annalen},
volume = {219},
year = {1976},
pages = {263-272},
zbl = {0327.10027},
url = {http://dml.mathdoc.fr/item/GDZPPN002312581}
}
Lippa, Erik A. Hecke Eigenforms of Degree Two: Dirichlet Series and Euler Products.. Mathematische Annalen, Tome 219 (1976) pp. 263-272. http://gdmltest.u-ga.fr/item/GDZPPN002312581/