BAKHTIN, O. K.; DENEGA, I. V. Estimation of the maximum product of inner radii of mutually disjoint domains. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 2, p. 173–183, 2020. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1106. Acesso em: 5 dec. 2025.