HEMMINGSEN, E. Plane continua admitting non-periodic autohomeo morphisms with equicontinuous iterates. Mathematica Scandinavica, Berkeley, CA, United States, v. 2, p. 119–141, 1954. DOI: 10.7146/math.scand.a-10401. Disponível em: https://journals.msp.org/mscand/article/view/2924. Acesso em: 25 jul. 2026.