ECHTERHOFF, Siegfried; QUIGG, John. Full duality for coactions of discrete groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 90, n. 2, p. 267–288, 2002. DOI: 10.7146/math.scand.a-14374. Disponível em: https://journals.msp.org/mscand/article/view/845. Acesso em: 24 jul. 2026.