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@article{AA_2001_13_4_a8, author = {P. V. Svetlov}, title = {Metrics of nonpositive curvature on infinite graph-manifolds}, journal = {Algebra i analiz}, pages = {174--195}, publisher = {mathdoc}, volume = {13}, number = {4}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_2001_13_4_a8/} }
P. V. Svetlov. Metrics of nonpositive curvature on infinite graph-manifolds. Algebra i analiz, Tome 13 (2001) no. 4, pp. 174-195. http://geodesic.mathdoc.fr/item/AA_2001_13_4_a8/