OKUYAMA, Y. On absolute generalized N"orlund summability of orthogonal series. Tamkang Journal of Mathematics, [S. l.], v. 33, n. 2, p. 161–166, 2002. DOI: 10.5556/j.tkjm.33.2002.295. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/295. Acesso em: 3 may. 2024.