R. Arul, and G. Ayyappan. “Oscillation Criteria for Third Order Neutral Difference Equations With Distributed Delay”. Malaya Journal of Matematik 1, no. 02 (April 1, 2013): 1–10. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/344.