ZAITSEV, D. I. Groups satisfying a weak minimum condition for non-Abelian subgroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 5, p. 661–665, 1971. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8337. Acesso em: 6 dec. 2025.