OGER, Francis. Cancellation of Abelian groups of finite rank modulo elementary equivalence. MATHEMATICA SCANDINAVICA, [S. l.], v. 67, p. 5–14, 1990. DOI: 10.7146/math.scand.a-12315. Disponível em: https://tidsskrift.dk/math/article/view/12315. Acesso em: 14 aug. 2026.