%0 Journal Article %A Stephen J. Pride %T Universal diagram groups with identical Poincaré series %J Groups, geometry, and dynamics %D 2010 %P 901-908 %V 4 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/113/ %R 10.4171/ggd/113 %F 10_4171_ggd_113