C. Soundara Rajan, and A. Murugesan. “Oscillatory and Asymptotic Behavior of Solutions to Second-Order Non-Linear Neutral Difference Equations of Advanced Type”. Malaya Journal of Matematik, vol. 9, no. 01, Jan. 2021, pp. 1160-6, https://www.malayajournal.org/index.php/mjm/article/view/1241.