@article{JMLR:v14:opper13a,
  author  = {Manfred Opper and Ulrich Paquet and Ole Winther},
  title   = {Perturbative Corrections for Approximate Inference in Gaussian Latent Variable Models},
  journal = {Journal of Machine Learning Research},
  year    = {2013},
  volume  = {14},
  number  = {87},
  pages   = {2857--2898},
  url     = {http://jmlr.org/papers/v14/opper13a.html}
}