@article{GDZPPN002099004,
title = {Mod p Hecke Operators and Congruences Between Modular Forms.},
journal = {Inventiones mathematicae},
volume = {74},
year = {1983},
pages = {193-206},
zbl = {0508.10018},
url = {http://dml.mathdoc.fr/item/GDZPPN002099004}
}
Ribet, Kenneth A. Mod p Hecke Operators and Congruences Between Modular Forms.. Inventiones mathematicae, Tome 74 (1983) pp. 193-206. http://gdmltest.u-ga.fr/item/GDZPPN002099004/