@inproceedings{EEDT,
    author = "J. Hu, Q. Yang, and  K. S. Kwak",
    title = "{Energy Efficiency and Delay Tradeoff in Wireless Powered Communication Networks}",
    booktitle = "Proc. of International Symposium on Communications and Information Technologies (ISCIT)",
    address = "Cairns, Australia",
    month = "Sept.",
    year = "2017"
    }