SULAIMAN, W. T. A NOTE ON TWO SUMMABILITY METHODS. Tamkang Journal of Mathematics, [S. l.], v. 23, n. 4, p. 289–295, 1992. DOI: 10.5556/j.tkjm.23.1992.4552. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4552. Acesso em: 21 dec. 2024.