CHRISTENSEN, Jens Peter Reus. Borel Structures and a Topological Zero-One Law. Mathematica Scandinavica, Berkeley, CA, United States, v. 29, p. 245–255, 1971. DOI: 10.7146/math.scand.a-11050. Disponível em: https://journals.msp.org/mscand/article/view/2308. Acesso em: 25 jul. 2026.