@article{1849,
  author = {Jianping Pan and Lin Cai and Thomas Hou and Yi Shi and Sherman Shen},
  title = {Optimal base-station locations in two-tiered wireless sensor networks},
  year = {2005},
  journal = {Mobile Computing, IEEE Transactions on},
  volume = {4},
  number = {5},
  pages = {458-473},
  publisher = {IEEE},
}