Bor, Hüseyin. “On the Absolute Cesàro Summability Factors”. Anal. Numér. Théor. Approx. 20, no. 1 (August 1, 1991): 11–14. Accessed November 23, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1991-vol20-nos1-2-art2.