LAURIE, C.; S. C., P. On the $C^*$-envelope of approximately finite-dimensional operator algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 80, p. 107–124, 1997. DOI: 10.7146/math.scand.a-12614. Disponível em: https://www.mscand.dk/article/view/12614. Acesso em: 6 may. 2024.