Victor Chepoi, Feodor F. Dragan, Bertrand Estellon, Michel Habib, Yann Vaxès. Diameters, centers, and approximating trees of delta-hyperbolicgeodesic spaces and graphs. In Monique Teillaud, editor, Proceedings of the 24th ACM Symposium on Computational Geometry, College Park, MD, USA, June 9-11, 2008. pages 59-68, ACM, 2008. [doi]