NIGAM, H. K. Degree of approximation of a function belonging to weighted $(L_r ,\xi(t ))$ class by (C,1)(E,q) means. Tamkang Journal of Mathematics, [S. l.], v. 42, n. 1, p. 31-37, 2011. DOI: 10.5556/j.tkjm.42.2011.514. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/514. Acesso em: 26 may. 2022.