POWER, Stephen. Infinite tensor products of upper triangular matrix algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 65, p. 291–307, 1989. DOI: 10.7146/math.scand.a-12284. Disponível em: https://journals.msp.org/mscand/article/view/1366. Acesso em: 24 jul. 2026.