RUBEL, L. A.; STRAUS, E. G. Special Trigonometric Series and the Riemann Hypothesis. Mathematica Scandinavica, Berkeley, CA, United States, v. 18, p. 35–44, 1966. DOI: 10.7146/math.scand.a-10778. Disponível em: https://journals.msp.org/mscand/article/view/2524. Acesso em: 25 jul. 2026.