@article{MAN_1970__185_161948,
     author = {J. LEHNER and A.O.L. ATKIN},
     title = {Hecke {Operators} on ... (m).},
     journal = {Mathematische Annalen},
     pages = {134--160},
     publisher = {mathdoc},
     volume = {185},
     year = {1970},
     zbl = {0177.34901},
     url = {http://geodesic.mathdoc.fr/item/MAN_1970__185_161948/}
}