KLÉN, R. Close-to-convexity of quasihyperbolic and j-metric balls. Annales Fennici Mathematici, [S. l.], v. 35, n. 2, p. 493–501, 2010. DOI: 10.5186/aasfm.2010.3530. Disponível em: https://afm.journal.fi/article/view/135320. Acesso em: 25 nov. 2024.