ANDENAES, Per Roar. Note on Metrization and on the Paracompact $p$-Spaces of Arhangel’skiĭ. Mathematica Scandinavica, Berkeley, CA, United States, v. 20, p. 245–248, 1967. DOI: 10.7146/math.scand.a-10834. Disponível em: https://journals.msp.org/mscand/article/view/2492. Acesso em: 25 jul. 2026.