%0 Journal Article %A Simon Thomas %T On the complexity of the quasi-isometry and virtual isomorphism problems for finitely generated groups %J Groups, geometry, and dynamics %D 2008 %P 281-307 %V 2 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/41/ %R 10.4171/ggd/41 %F 10_4171_ggd_41