A. Mubarak, A. Mubarak, E. Hamzah E. Hamzah, and M. R. M. Tofr M. R. M. Tofr. 2018. “REVIEW OF PHYSICAL VAPOUR DEPOSITION (PVD) TECHNIQUES FOR HARD COATING”. Jurnal Mekanikal 20 (2). https://jurnalmekanikal.utm.my/index.php/jurnalmekanikal/article/view/191.