AARNES, Johan F. Full Sets of States on a $C^*$- Algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 26, p. 141–148, 1970. DOI: 10.7146/math.scand.a-10973. Disponível em: https://tidsskrift.dk/math/article/view/10973. Acesso em: 14 aug. 2026.