%0 Journal Article
%A Vaserstein, L. N.
%T On normal subgroups of $\mathrm {GL}_2$ over rings with many units
%J Compositio Mathematica
%D 1990
%P 157-164
%V 74
%N 2
%I Kluwer Academic Publishers
%U http://archive.numdam.org/item/CM_1990__74_2_157_0/
%G en
%F CM_1990__74_2_157_0