E. Thandapani, and V. Balasubramanian. “Some Oscillation Theorems for Second Order Nonlinear Neutral Type Difference Equations”. Malaya Journal of Matematik 1, no. 03 (July 1, 2013): 34–43. Accessed November 22, 2024. https://www.malayajournal.org/index.php/mjm/article/view/360.