%0 Journal Article
%A Greg Hjorth
%T The isomorphism relation on countable torsion free
 abelian groups
%J Fundamenta Mathematicae
%D 2002
%P 241-257
%V 175
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm175-3-2/
%R 10.4064/fm175-3-2
%G en
%F 10_4064_fm175_3_2