KalybayA., and KaratayevaD. “Oscillation and Nonoscillation Criteria for a Half-Linear Difference Equation of the Second Order and Extended Discrete Hardy Inequality”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 1 (January 24, 2022): 45 - 60. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2298.