PEDERSEN, Gert K.; TAKAI, Hiroshi. Crossed products of $C^*$-algebras by approximately uniformly continous actions. MATHEMATICA SCANDINAVICA, [S. l.], v. 45, p. 282–288, 1979. DOI: 10.7146/math.scand.a-11843. Disponível em: https://tidsskrift.dk/math/article/view/11843. Acesso em: 13 aug. 2026.