TY  - JOUR
AU  - Dan Segal
TI  - Variations on a theme of Burns and Medvedev
JO  - Groups, geometry, and dynamics
PY  - 2007
SP  - 661
EP  - 668
VL  - 1
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4171/ggd/28/
DO  - 10.4171/ggd/28
ID  - 10_4171_ggd_28
ER  -