SINYAVSKII, O. V. Sum of Divisors in a Ring of Gaussian Integers. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 7, p. 970–982, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4317. Acesso em: 5 dec. 2025.