@ARTICLE{WU-Routing-IoT-14,
    AUTHOR = "Su Xia and Hongyi Wu and Miao Jin",
    TITLE = "{GPS-Free Greedy Routing with Delivery Guarantee and Low Stretch Factor on 2D and 3D Surfaces}",
    JOURNAL = "IEEE Internet of Things Journal",
    VOLUME = {1},
    NUMBER = {3},
    PAGES="233-242",
    YEAR = {2014},   }