MASLYUCHENKO, V. K.; FILIPCHUK, O. I. Discontinuity points of separately continuous mappings with at most countable set of values. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 6, p. 801–807, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1477. Acesso em: 5 dec. 2025.