ARCHBOLD, R. J.; SOMERSET, W. B. Transition probabilities and trace functions for $C^*$-algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 73, p. 81–111, 1993. DOI: 10.7146/math.scand.a-12458. Disponível em: https://www.mscand.dk/article/view/12458. Acesso em: 22 nov. 2024.