Azlan, Syahrizan, Nur Fitrah Najiha Muhamad Dzahir, Helmy Mustafa El Bakri, and Salwa Mahmood. “Safety Helmet Fit Assessment Using 3D Scanning and Helmet Fit Index (HFI)”. International Journal of Integrated Engineering 16, no. 6 (November 4, 2024): 172–181. Accessed April 7, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/18902.