ILLANES, Alejandro; VEJNAR, Benjamin. The hyperspace of non-blockers of singletons, all the possible examples. Topology Proceedings, [S. l.], v. 63, p. 23–27, 2023. Disponível em: https://www.topologyproceedings.org/index.php/tp/article/view/164. Acesso em: 30 jun. 2026.