Cumulant expansion of the periodic Anderson model: General derivation.

@article{Figueira1994CumulantEO,
  title={Cumulant expansion of the periodic Anderson model: General derivation.},
  author={Figueira and F{\'o}glio and Mart{\'i}nez},
  journal={Physical review. B, Condensed matter},
  year={1994},
  volume={50 24},
  pages={17933-17952}
}