DOMAR, Y. Some Results of Narrow Spectral Analysis. MATHEMATICA SCANDINAVICA, [S. l.], v. 20, p. 5–18, 1967. DOI: 10.7146/math.scand.a-10814. Disponível em: https://www.mscand.dk/article/view/10814. Acesso em: 5 may. 2024.