HAAGERUP, Uffe. On the dual weights for crossed products of von Neumann algebras I. Mathematica Scandinavica, Berkeley, CA, United States, v. 43, p. 99–118, 1978. DOI: 10.7146/math.scand.a-11768. Disponível em: https://journals.msp.org/mscand/article/view/1879. Acesso em: 25 jul. 2026.