@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/}
}