ARORA, Gurdial; DE ANGELIS, Valerio; UNNITHAN, Sindhu. A natural way to write non-Natural numbers. Scientia Series A: Mathematical Sciences, [S. l.], v. 30, p. 79–89, 2020. DOI: 10.71712/. Disponível em: https://revistas.usm.cl/scientia/article/view/41.. Acesso em: 28 jun. 2025.