Poletskіkh V. M. Layer-compact Abelian groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 1, p. 15–24, 1970. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8474. Acesso em: 6 dec. 2025.