Nordin, Nur Fatihah, Kee Quen Lee, Hooi Siang Kang, and Nor’ Azizi Othman. “Energy Harvesting of Daily Human Life Activities Using a Self-Made Piezoelectric System”. Progress in Energy and Environment 10 (October 10, 2019): 1–5. Accessed November 23, 2024. https://akademiabaru.com/submit/index.php/progee/article/view/1056.