TY  - JOUR
AU  - Tobias Finis
AU  - Erez Lapid
TI  - An approximation principle for congruence subgroups
JO  - Journal of the European Mathematical Society
PY  - 2018
SP  - 1075
EP  - 1138
VL  - 20
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4171/jems/783/
DO  - 10.4171/jems/783
ID  - JEMS_2018_20_5_a1
ER  -