NICOLAS, J.-L. A Robin inequality for n/phi(n). New Zealand Journal of Mathematics, [S. l.], v. 55, p. 1–9, 2024. DOI: 10.53733/324. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/324. Acesso em: 16 jun. 2024.