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@article{MAT_1969_13_3_a3, author = {Ya. Ihara}, title = {Hecke {Polynomials} as congruence $\xi$ functions in elliptic modular case}, journal = {Matematika}, pages = {72--100}, publisher = {mathdoc}, volume = {13}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1969_13_3_a3/} }
Ya. Ihara. Hecke Polynomials as congruence $\xi$ functions in elliptic modular case. Matematika, Tome 13 (1969) no. 3, pp. 72-100. http://geodesic.mathdoc.fr/item/MAT_1969_13_3_a3/