WU, T. S. Expansive Automorphisms in Compact Groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 18, p. 23–24, 1966. DOI: 10.7146/math.scand.a-10776. Disponível em: https://journals.msp.org/mscand/article/view/2527. Acesso em: 25 jul. 2026.