@article{JMLR:v14:riihimaki13a,
  author  = {Jaakko Riihimäki and Pasi Jylänki and Aki Vehtari},
  title   = {Nested Expectation Propagation for Gaussian Process Classification with a Multinomial Probit Likelihood},
  journal = {Journal of Machine Learning Research},
  year    = {2013},
  volume  = {14},
  number  = {3},
  pages   = {75--109},
  url     = {http://jmlr.org/papers/v14/riihimaki13a.html}
}