TY  - JOUR
AU  - Christopher F. Novak
TI  - Interval exchanges that do not occur in free groups
JO  - Groups, geometry, and dynamics
PY  - 2012
SP  - 755
EP  - 763
VL  - 6
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4171/ggd/173/
DO  - 10.4171/ggd/173
ID  - 10_4171_ggd_173
ER  -