PACHULIA, N. L. On Strong Summability of Fourier Series of Summable Functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 8, p. 1103–1111, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4514. Acesso em: 5 dec. 2025.