%0 Journal Article %A Charnow, A. %T A Note on Torsion Free Groups Generated by Pairs of Matrices %J Canadian mathematical bulletin %D 1975 %P 747-748 %V 17 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-134-4/ %R 10.4153/CMB-1974-134-4 %F 10_4153_CMB_1974_134_4