Abdal-Kadhim, A. M., Swee Leong, K., & Kok Tee, L. (2016). Impact Based Piezoelectric Energy Harvesting: Effect of Single Step’s Force and Velocity. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 8(5), 125–129. Retrieved from https://jtec.utem.edu.my/jtec/article/view/865