HEMMINGSEN, E. Plane continua admitting non-periodic autohomeo morphisms with equicontinuous iterates. MATHEMATICA SCANDINAVICA, [S. l.], v. 2, p. 119–141, 1954. DOI: 10.7146/math.scand.a-10401. Disponível em: https://tidsskrift.dk/math/article/view/10401. Acesso em: 14 aug. 2026.