BARYSHOVETS, P. P. Infinite Groups with Complemented Non-Abelian Subgroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 4, p. 447–455, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1995. Acesso em: 5 dec. 2025.