M. F. A. . Mohd Daud, A. A. Basari, N. X. . Yan, N. A. Ahmad Nawir, S. Hashimoto, and A. S. . Ahmad Isira, “Parametric Experimentation of Output Efficiency of Vibration-Based Impact Mode Piezoelectric Power Generator”, ijie, vol. 13, no. 2, pp. 61–71, Dec. 2020, Accessed: Jul. 18, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6493