@ARTICLE{6747384, author={Xie, Liguang and Shi, Yi and Hou, Y. Thomas and Lou, Wenjing and Sherali, Hanif D. and Midkiff, Scott F.}, journal={IEEE/ACM Transactions on Networking}, title={Multi-Node Wireless Energy Charging in Sensor Networks}, year={2015}, volume={23}, number={2}, pages={437-450}, doi={10.1109/TNET.2014.2303979}}