SUDO, T. Real rank estimate by hereditary $C^*$-subalgebras by projections. MATHEMATICA SCANDINAVICA, [S. l.], v. 100, n. 2, p. 361–367, 2007. DOI: 10.7146/math.scand.a-15027. Disponível em: https://www.mscand.dk/article/view/15027. Acesso em: 28 apr. 2024.