BAKHTIN , A. K.; ZABOLOTNII, Ya. V. Estimates of the products of inner radii for multiconnected domains. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 1, p. 9–22, 2021. DOI: 10.37863/umzh.v73i1.6200. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6200. Acesso em: 5 dec. 2025.