MAZHAR, S. M. On the Absolute Convergence of a Series Associated with a Fourier Series. Mathematica Scandinavica, Berkeley, CA, United States, v. 21, p. 90–104, 1967. DOI: 10.7146/math.scand.a-10848. Disponível em: https://journals.msp.org/mscand/article/view/2478. Acesso em: 25 jul. 2026.