@article{approximatebayesianinferenceasagauge,
  title = {Approximate Bayesian inference as a gauge theory},
  author = {Biswa Sengupta and Karl Friston},
  year = {2017},
  eprint = {1705.06614},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1705.06614v2},
}