PISKUNOV, A. G. Restorability of the Vietoris topology according to the compacts in the space of closed subgroups . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 42, n. 6, p. 789–794, 1990. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8838. Acesso em: 5 dec. 2025.