TY  - JOUR
AU  - Gonçalves, Jairo Zacarias
TI  - Free Subgroups of Units in Group Rings
JO  - Canadian mathematical bulletin
PY  - 1984
SP  - 309
EP  - 312
VL  - 27
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-046-7/
DO  - 10.4153/CMB-1984-046-7
ID  - 10_4153_CMB_1984_046_7
ER  -