@incollection {NIPS2003_AP02,
  author = " Anton Schwaighofer and  Marian Grigoras and  Volker Tresp and  Clemens Hoffmann",
  title = " GPPS: A Gaussian Process Positioning System for Cellular Networks",
  booktitle = "Advances in Neural Information Processing Systems 16",
  editor = "Sebastian Thrun and Lawrence Saul and Bernhard {Sch\"{o}lkopf}",
  publisher = "MIT Press",
  address = "Cambridge, MA",
  year = "2004",
  keywords = "Gaussian processes, cellular networks, localization, position estimation, Mat{\'e, maximum likelihood, optimal design",
  }