@incollection {NIPS2003_AA35,
  author = " Christopher J. Paciorek and  Mark J. Schervish",
  title = " Nonstationary Covariance Functions for Gaussian Process Regression",
  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 = "Bayesian inference, Gaussian processes, nonstationarity, nonparametric regression, function smoothness",
  }