%0 Journal Article
%A Bastos, Gervasio G.
%A Viswanathan, T. M.
%T Torsion-free Abelian Groups, Valuations and Twisted Group Rings
%J Canadian mathematical bulletin
%D 1988
%P 139-146
%V 31
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-021-x/
%R 10.4153/CMB-1988-021-x
%F 10_4153_CMB_1988_021_x