SULAIMAN, W. T. A Note on Factors for Absolute Norlund Summability. Communications in Mathematics and Applications, [S. l.], v. 1, n. 3, p. 133–138, 2010. DOI: 10.26713/cma.v1i3.120. Disponível em: http://rgnpublications.com/journals/index.php/cma/article/view/120. Acesso em: 24 nov. 2024.