SULAIMAN, W. T. MULTIPLIERS FOR $|C, \delta|_k$ SUMMABILITY OF FOURIER SERIES. Tamkang Journal of Mathematics, [S. l.], v. 21, n. 3, p. 185–190, 1990. DOI: 10.5556/j.tkjm.21.1990.4657. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4657. Acesso em: 21 dec. 2024.