CHARIN, V. S. On the theory of groups with generalized minimality condition for closed subgroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 3, p. 398–409, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4623. Acesso em: 5 dec. 2025.