SANDBERG, Sebastian. On non-holomorphic functional calculus for commuting operators. Mathematica Scandinavica, Berkeley, CA, United States, v. 93, n. 1, p. 109–135, 2003. DOI: 10.7146/math.scand.a-14416. Disponível em: https://journals.msp.org/mscand/article/view/803. Acesso em: 24 jul. 2026.