MALAN’INA, G. A.; CHERNIKOV, N. S. One condition of complementability in groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 10, p. 1417–1425, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5227. Acesso em: 5 dec. 2025.