LI, HORNG-JAAN, and SUI-SUN CHENG. “ASYMPTOTICALLY MONOTONE SOLUTIONS OF A NONLINEAR DIFFERENCE EQUATION”. Tamkang Journal of Mathematics 24, no. 3 (September 1, 1993): 269–282. Accessed December 22, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4497.