HAAGERUP, Uffe. On the dual weights for crossed products of von Neumann algebras II. Mathematica Scandinavica, Berkeley, CA, United States, v. 43, p. 119–140, 1978. DOI: 10.7146/math.scand.a-11769. Disponível em: https://journals.msp.org/mscand/article/view/1878. Acesso em: 25 jul. 2026.