Jaffer I., Mohammed Ali, and Selvaraj B. “Note on Oscillationa Theorems for Third Order Non-Linear Difference Equations”. Tamkang Journal of Mathematics 43, no. 4 (December 31, 2012): 491–498. Accessed May 7, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/760.