Ivko М. N.; SENASHOV, V. I. On a new class of infinite groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 6, p. 760–769, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5469. Acesso em: 6 dec. 2025.