CHERNIKOV, N. S. On finite solvable groups decomposable into the product of two nilpotent subgroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 6, p. 809–819, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4475. Acesso em: 5 dec. 2025.