MACKAY, J. M.; SISTO, A. Quasi-hyperbolic planes in relatively hyperbolic groups. Annales Fennici Mathematici, [S. l.], v. 45, n. 1, p. 139–174, 2020. DOI: 10.5186/aasfm.2020.4511. Disponível em: https://afm.journal.fi/article/view/135850. Acesso em: 8 sep. 2024.