DETOMI, E.; LUCCHINI, A. On the Structure of Primitive 𝓃-Sum Groups. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 3, p. 195–210, 2008. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1510. Acesso em: 29 apr. 2024.