ENOMOTO, M.; NAGISA, M.; WATATANI, Y. Relative commutant algebras of Powers’ binary shifts on the hyperfinite $\mathrm{II}_1$ factor. Mathematica Scandinavica, Berkeley, CA, United States, v. 68, p. 115–130, 1991. DOI: 10.7146/math.scand.a-12350. Disponível em: https://journals.msp.org/mscand/article/view/1281. Acesso em: 25 jul. 2026.