KEHLET, Esben T. Cross sections for quotient maps of locally compact groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 55, p. 152–160, 1984. DOI: 10.7146/math.scand.a-12073. Disponível em: https://journals.msp.org/mscand/article/view/1606. Acesso em: 25 jul. 2026.