Gasim Salim, A., عبد, A. Salim Youns Abdullah, and أنس. “Studying the Stability of a Non-Linear Autoregressive Model (Polynomial With Hyperbolic Cosine Function)”. AL-Rafidain Journal of Computer Sciences and Mathematics, vol. 11, no. 1, June 2025, pp. 81-91, https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19393.