IZUMI, M.; IZUMI, S.- ichi. Some Convergence Criteria for Fourier Series. The Journal of the Indian Mathematical Society, [S. l.], v. 32, n. 1-2, p. 355–379, 1968. DOI: 10.18311/jims/1968/16781. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/16781. Acesso em: 25 apr. 2024.