KOSAKI, Hideki. Positive cones associated with a von Neumann algebra. Mathematica Scandinavica, Berkeley, CA, United States, v. 47, p. 295–307, 1980. DOI: 10.7146/math.scand.a-11891. Disponível em: https://journals.msp.org/mscand/article/view/1756. Acesso em: 25 jul. 2026.