ALVAREZ-SAMANIEGO, B.; MERINO, A. Some properties related to the Cantor-Bendixson derivative on a Polish space. New Zealand Journal of Mathematics, [S. l.], v. 50, p. 207–218, 2021. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/82. Acesso em: 8 dec. 2021.