B. A. Md Zain, “The Concept of Flexible Lower Limb Powered-Exoskeleton for Human Performance Augmentation: A Review”, IJIE, vol. 16, no. 9, pp. 230–246, Dec. 2024, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/8100