FRIEDLANDER, John B. Small values of zeta-functions of quadratic fields. Mathematica Scandinavica, Berkeley, CA, United States, v. 42, p. 161–168, 1978. DOI: 10.7146/math.scand.a-11744. Disponível em: https://journals.msp.org/mscand/article/view/1898. Acesso em: 25 jul. 2026.