M. T. Aranés, Modular symbols over number fields, 2010.

L. Bianchi, Sui gruppi di sostituzioni lineari con coefficienti appartenenti a corpi quadratici immaginarî, Math. Ann, vol.40, issue.3, pp.332-412, 1892.

S. , Math. Ann, vol.42, issue.1, pp.30-57, 1893.

A. Borel and J. Serre, Corners and arithmetic groups, Comment. Math. Helv, vol.48, 1973.

D. A. Cox, Fermat, class field theory, and complex multiplication. MR3236783, Zbl, 2013.

J. E. Cremona, Hyperbolic tessellations, modular symbols, and elliptic curves over complex quadratic fields, Compositio Math, vol.51, issue.3, pp.275-324, 1984.

J. E. Cremona and M. T. Aranés, Congruence subgroups, cusps and Manin symbols over number fields, Computations with modular forms, Contrib. Math. Comput. Sci, vol.6, p.3381450, 2014.

J. Elstrodt, F. Grunewald, and J. Mennicke, Groups acting on hyperbolic space, MR1483315 (98g:11058), 1998.

B. Fine, Algebraic theory of the Bianchi groups, Monographs and Textbooks in Pure and Applied Mathematics, vol.129, 1989.

C. Maclachlan and A. W. Reid, The arithmetic of hyperbolic 3-manifolds, Graduate Texts in Mathematics, vol.219, 2003.

E. R. Mendoza, Cohomology of PGL 2 over imaginary quadratic integers, vol.128, p.611515, 1979.
URL : https://hal.archives-ouvertes.fr/tel-02573006

A. D. Rahm, Higher torsion in the Abelianization of the full Bianchi groups, C. R. Math. Acad. Sci. Paris, vol.16, issue.15, 2012.
URL : https://hal.archives-ouvertes.fr/hal-00721690

C. To, On a question of Serre, C. R. Math. Acad. Sci. Paris, vol.357, pp.589-590, 2019.

A. D. Rahm and M. H. ?engün, On level one cuspidal Bianchi modular forms, LMS J. Comput. Math, vol.16, pp.187-199, 2013.
URL : https://hal.archives-ouvertes.fr/hal-00589184

A. D. Rahm and P. Tsaknias, Genuine Bianchi modular forms of higher level, at varying weight and discriminant, Journal de Théorie des Nombres de Bordeaux, vol.31, issue.1, pp.27-48, 2019.
URL : https://hal.archives-ouvertes.fr/hal-01478115

J. Serre, Le problème des groupes de congruence pour SL 2, Ann. of Math, issue.2, p.272790, 1970.

R. G. Swan, Generators and relations for certain special linear groups, Advances in Math, vol.6, 1971.

P. J. Weinberger, Exponents of the class groups of complex quadratic fields, Acta Arith, vol.22, 1973.

. Université-de-la-polynésie-française, G. Laboratoire, and . Url,