BELLISARD, Jean; IOCHUM, Bruno. Spectral theory for facially homogenous symmetric self-dual cones. Mathematica Scandinavica, Berkeley, CA, United States, v. 45, p. 118–126, 1979. DOI: 10.7146/math.scand.a-11829. Disponível em: https://journals.msp.org/mscand/article/view/1817. Acesso em: 25 jul. 2026.