SANJAY TRIPATHI. Absolute Summability of a Lacunary Fourier Series. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 4 - B, p. 129–131, 2017. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1247. Acesso em: 22 jul. 2024.