TY  - JOUR
AU  - S. V. Buyalo
TI  - Estimation of the volume entropy for graph-manifolds of nonpositive curvature
JO  - Algebra i analiz
PY  - 2003
SP  - 63
EP  - 72
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2003_15_1_a1/
LA  - ru
ID  - AA_2003_15_1_a1
ER  -