LINDAHL, Lars-ake. On Narrow Spectral Analysis. Mathematica Scandinavica, Berkeley, CA, United States, v. 26, p. 149–164, 1970. DOI: 10.7146/math.scand.a-10974. Disponível em: https://journals.msp.org/mscand/article/view/2350. Acesso em: 25 jul. 2026.