Fawzi AL-Azzawi, Saad, and Karam A. Abed. “Using Δ - Discriminate Method to Determine the Stability and Bifurcation of Chen Chaotic System”. AL-Rafidain Journal of Computer Sciences and Mathematics 8, no. 2 (December 8, 2011): 111–122. Accessed December 18, 2025. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36641.