@ARTICLE {9560,
author={N.B.C. Carvalho and A. Boaventura},
doi={10.1109/TMTT.2014.2303420},
journal={IEEE Transactions on Microwave Theory and Techniques},
title={Wireless Power Transmission: R&D Activities Within Europe},
year={2014},
month={April},
volume={62},
number={4},
pages={1031-1045},
ISSN={0018-9480}
}