LIN, Huaxin. Singly Supported $C^*$-Algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 71, p. 133–144, 1992. DOI: 10.7146/math.scand.a-12416. Disponível em: https://journals.msp.org/mscand/article/view/1231. Acesso em: 25 jul. 2026.