FREDEN, E. M. Negatively curved groups and the convergence property II: Transitivity in negatively curved groups. Annales Fennici Mathematici, [S. l.], v. 21, n. 1, p. 133–150, 1996. Disponível em: https://afm.journal.fi/article/view/134858. Acesso em: 25 nov. 2024.