FERNSTRÖM, C. On the instability of Hausdorff content. MATHEMATICA SCANDINAVICA, [S. l.], v. 60, p. 19–30, 1987. DOI: 10.7146/math.scand.a-12168. Disponível em: https://www.mscand.dk/article/view/12168. Acesso em: 28 apr. 2024.