On the hyperbolicity constant in graphs. - José M. Rodríguez 001; José María Sigarreta; Jean-Marie Vilaire; María Villeta (Discret. Math., 2011)

Gromov hyperbolic graphs. - Sergio Bermudo; José M. Rodríguez 001; José María Sigarreta; Jean-Marie Vilaire (Discret. Math., 2013)