@article{GDZPPN002316781, title = {Eigenvalues of Hecke Operators on SL(2,Z).}, journal = {Mathematische Annalen}, volume = {243}, year = {1979}, pages = {75-96}, zbl = {0377.10016}, url = {http://dml.mathdoc.fr/item/GDZPPN002316781} }
Hatada, Kazuyuki. Eigenvalues of Hecke Operators on SL(2,Z).. Mathematische Annalen, Tome 243 (1979) pp. 75-96. http://gdmltest.u-ga.fr/item/GDZPPN002316781/