%0 Journal Article
%A S. V. Buyalo
%T Estimation of the volume entropy for graph-manifolds of nonpositive curvature
%J Algebra i analiz
%D 2003
%P 63-72
%V 15
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_2003_15_1_a1/
%G ru
%F AA_2003_15_1_a1