Hue, Nguyen Ngoc, and Duong Quoc Huy. “Monotonicity of Sequences Involving Generalized Convexity Function and Sequences”. Tamkang Journal of Mathematics 46, no. 2 (June 30, 2015): 121–127. Accessed April 29, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1626.