QUIGG, John C. Lanstad Duality for $C^*$-Coactions. MATHEMATICA SCANDINAVICA, [S. l.], v. 71, p. 277–294, 1992. DOI: 10.7146/math.scand.a-12429. Disponível em: https://tidsskrift.dk/math/article/view/12429. Acesso em: 13 aug. 2026.