BAKHTIN, A. K. Sharp estimates for inner radii of systems of nonoverlapping domains and open sets. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 12, p. 1601–1618, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3416. Acesso em: 6 dec. 2025.