Chee Kiong, Sia, and Teu Shieh Em. 2023. “Optimization of Process Parameters for Polylactic Acid (PLA) of FDM Using Particle Swarm Optimization (PSO)”. Research Progress in Mechanical and Manufacturing Engineering 4 (1): 205-17. https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/9104.