Rahat Tamzid; Ehfaz Faisal Mahee; Md. Anwar Hussen Wadud; Rahman, A.; Miraz Ahmed; Md Ashikur Rahman; Abu Saleh Musa Miah; Fahim Al Farid; Sarina Mansor. Enhancing Two-Wheeler Rider Safety With Helmet-Based Head Movement Monitoring and IoT Integration Using Safe Angle Formula. Stat., optim. inf. comput. 2026.