WANG, X.; HUANG, M.; PONNUSAMY, S.; CHU, Y. Hyperbolic distance, \lambda-Apollonian metric and John disks. Annales Fennici Mathematici, [S. l.], v. 32, n. 2, p. 371–380, 2007. Disponível em: https://afm.journal.fi/article/view/135199. Acesso em: 25 nov. 2024.