TY  - JOUR
AU  - Sambusetti, Andrea
TI  - Asymptotic properties of coverings in negative curvature
JO  - Geometry & topology
PY  - 2008
SP  - 617
EP  - 637
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.2140/gt.2008.12.617/
DO  - 10.2140/gt.2008.12.617
ID  - GT_2008_12_1_a13
ER  -