%0 Journal Article
%A S. V. Buyalo
%T Metrics of nonpositive curvature on graph-manifolds and electromagnetic fields on graphs
%J Zapiski Nauchnykh Seminarov POMI
%D 2001
%P 28-72
%V 280
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2001_280_a3/
%G ru
%F ZNSL_2001_280_a3