TOZZI, Arturo; PETERS, James F. Topology of Black Holes’ Horizons. Emerging Science Journal, [S. l.], v. 3, n. 2, p. 58–63, 2019. DOI: 10.28991/esj-2019-01169. Disponível em: https://www.ijournalse.org/index.php/ESJ/article/view/151. Acesso em: 1 jul. 2025.