BAKHTIN, A. K. Inequalities for the inner radii of nonoverlapping domains and open sets. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 5, p. 596–610, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3044. Acesso em: 5 dec. 2025.