SEMKO, N. N. On the construction of CDN[]-groups with elementary commutant of rank two. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 10, p. 1396–1403, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5137. Acesso em: 5 dec. 2025.