LIN, Huaxin. The simplicity of the quotient algebra $M(A)/A$ of a simple $C^*$-algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 65, p. 119–128, 1989. DOI: 10.7146/math.scand.a-12270. Disponível em: https://tidsskrift.dk/math/article/view/12270. Acesso em: 14 aug. 2026.