A. George Maria Selvam, M. Paul Loganathan, and K. R. Rajkumar. “Oscillatory Properties of Third-Order Neutral Delay Difference Equations”. International Journal of Mathematics And its Applications 3, no. 4 - A (December 1, 2015): 9–13. Accessed May 20, 2024. http://ijmaa.in/index.php/ijmaa/article/view/481.