PEDERSEN, Gert Kjaergaard. Measure Theory for $C^*$ Algebras II. Mathematica Scandinavica, Berkeley, CA, United States, v. 22, p. 63–74, 1968. DOI: 10.7146/math.scand.a-10871. Disponível em: https://journals.msp.org/mscand/article/view/2427. Acesso em: 25 jul. 2026.