PHILLIPS, N. C. Simple $C^*$-algebras with the property weak (FU). MATHEMATICA SCANDINAVICA, [S. l.], v. 69, p. 127–151, 1991. DOI: 10.7146/math.scand.a-12372. Disponível em: https://www.mscand.dk/article/view/12372. Acesso em: 14 apr. 2025.