Chachan, Hanan Ali, and Faez Hassan ali. “Using Non-Dominated Sorting Particle Swarm Optimization Algorithm II for Bi-Objective Flow Shop Scheduling Problems”. Iraqi Journal of Science 62, no. 1 (January 30, 2021): 275–288. Accessed December 20, 2025. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3091.