Azlan S, Nur Fitrah Najiha Muhamad Dzahir, Mustafa El Bakri H, Mahmood S. Safety Helmet Fit Assessment Using 3D Scanning and Helmet Fit Index (HFI). IJIE. 2024;16(6):172-181. Accessed April 7, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/18902