1. Geodesics and curvature in metric simplicial complexes;Bridson,1991
2. Groups acting on Graphs;Dicks,1989
3. Constructions of hyperbolic groups via hyperbolizations of polyhedra;Paulin,1991
4. R. Gitik, M. Mitra, E. Rips, M. Sageev, 1995, Bounded width in hyperbolic groups
5. Hyperbolic groups;Gromov,1987