CHENG, SUI SUN, and REUIH FEN LU. “A GENERALIZATION OF THE DISCRETE HARDY’S INEQUALITY”. Tamkang Journal of Mathematics 24, no. 4 (December 1, 1993): 469–475. Accessed May 5, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4518.