STEFANSSON, J. R. On a Problem of J. Dixmier Concerning Ideals in a von Neumann Algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 24, p. 111–112, 1969. DOI: 10.7146/math.scand.a-10924. Disponível em: https://www.mscand.dk/article/view/10924. Acesso em: 29 apr. 2024.