%0 Journal Article
%A Jan Krempa
%T On free subgroups of units in quaternion algebras II
%J Colloquium Mathematicum
%D 2003
%P 29-32
%V 97
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm97-1-4/
%R 10.4064/cm97-1-4
%G en
%F 10_4064_cm97_1_4