%0 Journal Article %A P. V. Svetlov %T Graph-manifolds of nonpositive curvature are virtually fibered over a~circle %J Algebra i analiz %D 2002 %P 188-201 %V 14 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_2002_14_5_a9/ %G ru %F AA_2002_14_5_a9