MUKHERJEE, S.; J KHAN, A. Approximation Theory on Summability of Fourier Series. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 54, n. 1, p. 131–136, 2019. Disponível em: https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4764. Acesso em: 4 may. 2024.