Nordin, N.H. Diyana, et al. “Voltage Generation in Piezoelectric Energy Harvesting With Magnet: FEA Simulation and Experimental Analysis”. Journal of Science and Technology, vol. 13, no. 2, Dec. 2021, pp. 17-24, https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/8581.