IZUCHI, Keiji. Sidon sets and Fourier-Stieltjes transforms of some prime $L$-ideals. Mathematica Scandinavica, Berkeley, CA, United States, v. 40, p. 46–50, 1977. DOI: 10.7146/math.scand.a-11674. Disponível em: https://journals.msp.org/mscand/article/view/1969. Acesso em: 25 jul. 2026.