PEDERSEN, G. K. Measure Theory for $C^*$ Algebras II. MATHEMATICA SCANDINAVICA, [S. l.], v. 22, p. 63–74, 1968. DOI: 10.7146/math.scand.a-10871. Disponível em: https://www.mscand.dk/article/view/10871. Acesso em: 4 may. 2024.