%0 Journal Article %A Burns, R. G. %A Hale, V. W. D. %T A Note on Group Rings of Certain Torsion-Free Groups %J Canadian mathematical bulletin %D 1972 %P 441-445 %V 15 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-080-3/ %R 10.4153/CMB-1972-080-3 %F 10_4153_CMB_1972_080_3