StegantsevaP. G., & SkryabinaA. V. (2021). Topologies on the $n$-element set that consistent with close to the discrete topologies on $(n −1)$-element set. Ukrains’kyi Matematychnyi Zhurnal, 73(2), 238 - 248. https://doi.org/10.37863/umzh.v73i2.6174