%0 Journal Article
%A Kai-Uwe Bux
%A Mikhail Ershov
%A Andrei S. Rapinchuk
%T The congruence subgroup property for Aut $F_2$:  A group-theoretic proof of Asada’s theorem
%J Groups, geometry, and dynamics
%D 2011
%P 327-353
%V 5
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4171/ggd/130/
%R 10.4171/ggd/130
%F 10_4171_ggd_130