SamoilenkoM. V., and TeplinskyYu. V. “On Periodic Solutions of Countable Systems of Linear and Quasilinear Difference Equations With Periodic Coefficients”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 8 (August 25, 1996): 1144-1152. Accessed November 28, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5258.