Pehlivan, S., and Ö. Cakar. “THE SEQUENCE SPACE $\mathcal C(p)$ AND RELATED MATRIX TRANSFORMATIONS”. Tamkang Journal of Mathematics 21, no. 3 (September 1, 1990): 233–237. Accessed April 24, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4668.