@article{GDZPPN002223511, title = {Congruences for Eigenvalues of Hecke Operators on SL2(Z).}, journal = {Manuscripta mathematica}, volume = {35}, year = {1981}, pages = {305-326}, zbl = {0462.10017}, url = {http://dml.mathdoc.fr/item/GDZPPN002223511} }
Hatada, Kazuyuki. Congruences for Eigenvalues of Hecke Operators on SL2(Z).. Manuscripta mathematica, Tome 35 (1981) pp. 305-326. http://gdmltest.u-ga.fr/item/GDZPPN002223511/