BAKHTIN, A. K.; V'YUN, V. E. Application of a separating transformation to estimates of inner radii of open sets. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 10, p. 1313–1321, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3390. Acesso em: 5 dec. 2025.