@article{hsiao01__geogr_region_summar_servic_geogr_routin,
  author = {Hsiao, Pai-Hsiang},
  title = {Geographical Region Summary Service for Geographical Routing},
  journal = {Mobile Computing and Communications Review},
  year = {2001},
  volume = {5},
  number = {4},
  pages = {25-39},
  month = {October}
}