Samoilenko MV, Teplinsky YV. On periodic solutions of countable systems of linear and quasilinear difference equations with periodic coefficients. Ukr. Mat. Zhurn. [Internet]. 1996 Aug. 25 [cited 2025 Apr. 13];48(8):1144-52. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5258