KEHLET, E. T. A proof of the Mackey-Blattner-Nielsen theorem. MATHEMATICA SCANDINAVICA, [S. l.], v. 43, p. 329–335, 1978. DOI: 10.7146/math.scand.a-11786. Disponível em: https://www.mscand.dk/article/view/11786. Acesso em: 4 may. 2024.