BRATTELI, O.; HERMAN, R. H. ,robinson,. D. W. Quasianalytic vectors and derivations of operator algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 39, p. 371–381, 1976. DOI: 10.7146/math.scand.a-11670. Disponível em: https://journals.msp.org/mscand/article/view/1977. Acesso em: 25 jul. 2026.