%0 Journal Article
%A Mark F. Hagen
%A Daniel T. Wise
%T Special groups with an elementary hierarchy are virtually free-by-$ℤ$
%J Groups, geometry, and dynamics
%D 2010
%P 597-603
%V 4
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4171/ggd/96/
%R 10.4171/ggd/96
%F 10_4171_ggd_96