LAURIE, C.; S. C., Power. On the $C^*$-envelope of approximately finite-dimensional operator algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 80, p. 107–124, 1997. DOI: 10.7146/math.scand.a-12614. Disponível em: https://journals.msp.org/mscand/article/view/1014. Acesso em: 24 jul. 2026.