@ARTICLE{hightower2001location,
  author    = "Jeffrey Hightower and Gaetano Borriello",
  title     = "Location Systems for Ubiquitous Computing",
  journal   = "Computer",
  publisher = "IEEE Computer Society Press",
  volume    = "34",
  number    = "8",
  pages     = "57-66",
  note      = "This article is also excerpted in ``IT Roadmap to a Geospatial Future,'' a 2003 report from the Computer Science and Telecommunications Board of the National Research Council",
  month     = "August",
  year      = {2001}
}