OSAKA, H. Certain $C^*$-algebras with non-zero real rank and extremal richness. MATHEMATICA SCANDINAVICA, [S. l.], v. 85, n. 1, p. 79–86, 1999. DOI: 10.7146/math.scand.a-13886. Disponível em: https://www.mscand.dk/article/view/13886. Acesso em: 28 apr. 2024.