KURDACHENKO, L. A.; SEMKO, N. N. Groups with weak maximality condition for nonnilpotent subgroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 8, p. 1068–1083, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3514. Acesso em: 16 feb. 2026.