HEWITT, E.; RUBIN, H. The maximum value of a Fourier-Stieltjes transform. MATHEMATICA SCANDINAVICA, [S. l.], v. 3, p. 97–102, 1955. DOI: 10.7146/math.scand.a-10429. Disponível em: https://www.mscand.dk/article/view/10429. Acesso em: 6 may. 2024.