Bagus Prasetiyo, Angger, Kartinasari Ayuhikmatin Sekarjati, and Alva Edy Tontowi. “Application of RSM Method in Optimization of 3D Printing Machine Process Parameters Using Biocomposite Materials (PMMA/Hydroxyapatite) to Get the Highest Tension Strength”. Journal of Energy, Mechanical, Material, and Manufacturing Engineering 6, no. 2 (December 17, 2021): 119–126. Accessed November 22, 2024. https://ejournal.umm.ac.id/index.php/JEMMME/article/view/17780.