STEGANTSEVA, P. G.; SKRYABINA, A. V. Topologies on the $n$-element set that consistent with close to the discrete topologies on $(n −1)$-element set. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 2, p. 238–248, 2021. DOI: 10.37863/umzh.v73i2.6174. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6174. Acesso em: 5 dec. 2025.