STACHÓ, L. L. On the spectrum of inner derivations in partial Jordan triples. Mathematica Scandinavica, Berkeley, CA, United States, v. 66, p. 242–248, 1990. DOI: 10.7146/math.scand.a-12308. Disponível em: https://journals.msp.org/mscand/article/view/1316. Acesso em: 24 jul. 2026.