@article{PMIHES_1976__46__107_0,
     author = {Madabusi S. Raghunathan},
     title = {On the congruence subgroup problem},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {107--161},
     year = {1976},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {46},
     doi = {10.1007/BF02684320},
     mrnumber = {58 #22325},
     zbl = {0347.20027},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02684320/}
}