ALFSEN, E. M.; FENSTAD, J. E. A Note on Completion and Compactification. MATHEMATICA SCANDINAVICA, [S. l.], v. 8, p. 97–104, 1960. DOI: 10.7146/math.scand.a-10596. Disponível em: https://www.mscand.dk/article/view/10596. Acesso em: 5 may. 2024.