N. Hussin, M. M. Azizan, A. Ali, and M. A. M. Albreem, “Comparison of Performance based on Power of Energy Encryption in Medium Field for Wireless Power Transfer System”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 5, pp. 1805–1810, Oct. 2017.