TY  - JOUR
AU  - Bastos, Gervasio G.
AU  - Viswanathan, T. M.
TI  - Torsion-free Abelian Groups, Valuations and Twisted Group Rings
JO  - Canadian mathematical bulletin
PY  - 1988
SP  - 139
EP  - 146
VL  - 31
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-021-x/
DO  - 10.4153/CMB-1988-021-x
ID  - 10_4153_CMB_1988_021_x
ER  -