BARTSCH, R.; KUHLMANN, K.; KUHLMANN, F.-V. Construction of ball spaces and the notion of continuity. New Zealand Journal of Mathematics, [S. l.], v. 51, p. 49–64, 2021. DOI: 10.53733/157. Disponível em: https://www.nzjmath.org/index.php/NZJMATH/article/view/157. Acesso em: 16 may. 2022.