AARNES, J. 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://www.mscand.dk/article/view/10973. Acesso em: 20 apr. 2024.