CHRISTENSEN, Jens Peter Reus. Borel Structures and a Topological Zero-One Law. MATHEMATICA SCANDINAVICA, [S. l.], v. 29, p. 245–255, 1971. DOI: 10.7146/math.scand.a-11050. Disponível em: https://tidsskrift.dk/math/article/view/11050. Acesso em: 14 aug. 2026.