@article{JMLR:v6:quinonero-candela05a,
  author  = {Joaquin Qui{{\~n}}onero-Candela and Carl Edward Rasmussen},
  title   = {A Unifying View of Sparse Approximate Gaussian Process Regression},
  journal = {Journal of Machine Learning Research},
  year    = {2005},
  volume  = {6},
  number  = {65},
  pages   = {1939--1959},
  url     = {http://jmlr.org/papers/v6/quinonero-candela05a.html}
}