ZHU, Zhangsheng; FANG, Junsheng; SHI, Rui. On a class of operators in the hyperfinite $\mathrm{II}_1$ factor. Mathematica Scandinavica, Berkeley, CA, United States, v. 120, n. 2, p. 249–271, 2017. DOI: 10.7146/math.scand.a-25625. Disponível em: https://journals.msp.org/mscand/article/view/322. Acesso em: 24 jul. 2026.