LUKASHOVA, T. D. On Noncyclic Norm of Infinite Locally Finite Groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 3, p. 342–349, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4070. Acesso em: 5 dec. 2025.