S. Sindhuja, J. Daphy Louis Lovenia, A. P. Lavanya. “Oscillation of Second Order Nonlinear Neutral Difference Equations”. Mathematical Statistician and Engineering Applications 71, no. 4 (August 29, 2022): 1095–1099. Accessed May 7, 2024. https://www.philstat.org/index.php/MSEA/article/view/608.