@article{watanabe2010belief,
  title={{Belief propagation and loop calculus for the permanent of a non-negative matrix}},
  author={Watanabe, Y. and Chertkov, M.},
  journal={Journal of Physics A: Mathematical and Theoretical},
  volume={43},
  number={24}
  pages={242002},
  note={FAST TRACK COMMUNICATION},
  year={2010},
  publisher={IOP Publishing}
}