TY  - JOUR
AU  - Volodymyr V. Nekrashevych
TI  - Free subgroups in groups acting on rooted trees
JO  - Groups, geometry, and dynamics
PY  - 2010
SP  - 847
EP  - 862
VL  - 4
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4171/ggd/110/
DO  - 10.4171/ggd/110
ID  - 10_4171_ggd_110
ER  -