%0 Journal Article
%A Tobias Finis
%A Erez Lapid
%T An approximation principle for congruence subgroups
%J Journal of the European Mathematical Society
%D 2018
%P 1075-1138
%V 20
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4171/jems/783/
%R 10.4171/jems/783
%F JEMS_2018_20_5_a1