YUASA, Hisatoshi. Not finitely but countably Hopf-equivalent clopen sets in a Cantor minimal system. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 2, p. 355–371, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.024. Acesso em: 8 jul. 2025.