Chen, Chao-Ping, and Feng Qi. “Generalization of an Inequality of Alzer for Negative Powers”. Tamkang Journal of Mathematics 36, no. 3 (September 30, 2005): 219–222. Accessed April 27, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/113.