Subaramaniyam Jaikumar, Kandasamy Alagesan, and Govindasamy Ayyappan. “New Oscillation Criteria for Fourth Order Delay Difference Equations With Damping”. Malaya Journal of Matematik 8, no. 03 (July 1, 2020): 838–844. Accessed November 22, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1511.