Koeddit , Sirirat, and Wirot Tikjha. “Periodic Solution of a Piecewise Linear System of Difference Equations with Initial Condition in Positive X - Axis”. Burapha Science Journal 26, no. 3 September-December (March 19, 2026): 1875–1886. accessed September 2, 2026. https://li05.tci-thaijo.org/index.php/buuscij/article/view/1365.