Irfan Nasran Nazari, et al. “PIEZOELECTRIC ENERGY HARVESTING MODEL FROM VIBRATION: EFFECT OF PATCH MATERIALS AND DIFFERENT SOURCE OF VIBRATIONS”. Marine Frontier, vol. 12, no. 1, June 2021, pp. 43-53, https://ejournal.unikl.edu.my/index.php/mf/article/view/402.