@inproceedings{gu-sensys06,
  author    = {Yu Gu and Tian He},
  title     = {{uScan: A Lightweight Two-Tier Global Sensing Coverage Design}},
  booktitle = {SenSys '06: Proceedings of the 4th International Conference on Embedded Networked Sensor Systems},
  year      = {2006},
  pages     = {399-400},
}