https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1302421
Lo, E., Truong, H. and Elnatan, L. (2005) Alvin Mar, Ha Nguyen, Wireless Battery Charger. Final...
Lo, E., Truong, H. and Elnatan, L. (2005) Alvin Mar, Ha Nguyen, Wireless Battery Charger. Final Report.