LAL, S.; SINGH, P. N. On the study of conjugate series of a Fourier series by $ K^\lambda$-summability methods. Tamkang Journal of Mathematics, [S. l.], v. 34, n. 2, p. 147–154, 2003. DOI: 10.5556/j.tkjm.34.2003.261. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/261. Acesso em: 28 mar. 2024.