ARNOLD, D. M. An Introduction to the Structure of Abelian Groups. CUBO, A Mathematical Journal, [S. l.], v. 4, n. 1, p. 148–166, 2002. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1728. Acesso em: 20 may. 2024.