Nikiforova, N. S., and D. Ya. Khusainov. “Stability of One Difference Equation With Positive Coefficients”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 9 (September 25, 1999): 1276–1280. Accessed May 17, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4723.