@article{JMLR:v14:chertkov13a,
  author  = {Michael Chertkov and Adam B. Yedidia},
  title   = {Approximating the Permanent with Fractional Belief Propagation},
  journal = {Journal of Machine Learning Research},
  year    = {2013},
  volume  = {14},
  number  = {62},
  pages   = {2029--2066},
  url     = {http://jmlr.org/papers/v14/chertkov13a.html}
}