CHRISTENSEN, E. Non Commutative Integration for Monotone Sequentially Closed $C^*$ Algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 31, p. 171–190, 1972. DOI: 10.7146/math.scand.a-11423. Disponível em: https://www.mscand.dk/article/view/11423. Acesso em: 6 may. 2024.