R. Naji and R. Saady, “The Dynamics of Four-Species Ecological Model”, Iraqi Journal of Science, vol. 55, no. 2A, pp. 506–529, Nov. 2023, Accessed: Dec. 07, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11723