%0 Journal Article
%A Jan Krempa
%T On free subgroups of units
in quaternion algebras
%J Colloquium Mathematicum
%D 2001
%P 21-27
%V 88
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm88-1-3/
%R 10.4064/cm88-1-3
%G en
%F 10_4064_cm88_1_3