DAWS, Matthew. Connes-amenability of bidual and weighted semigroup algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 99, n. 2, p. 217–246, 2006. DOI: 10.7146/math.scand.a-15010. Disponível em: https://journals.msp.org/mscand/article/view/687. Acesso em: 24 jul. 2026.