BJÖRNSSON, Ottó J. A note on the characterization of standard Borel spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 47, p. 135–136, 1980. DOI: 10.7146/math.scand.a-11879. Disponível em: https://journals.msp.org/mscand/article/view/1771. Acesso em: 25 jul. 2026.