Khalaf, Hade, and Musaab Riyadh. “Human Activity Recognition Using Inertial Sensors in a Smartphone: Technical Background (Review)”. Al-Nahrain Journal of Science 27, no. 1 (March 15, 2024): 108–120. Accessed May 22, 2026. https://mail.anjs.edu.iq/index.php/anjs/article/view/2634.