PEDERSEN, Gert Kjaergard. Measure Theory for $C^*$ Algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 19, p. 131–145, 1966. DOI: 10.7146/math.scand.a-10802. Disponível em: https://tidsskrift.dk/math/article/view/10802. Acesso em: 14 aug. 2026.