@article{Mathieu:2010Dn,
  author = "Mathieu, Vincent",
  title = "{\eta  - \eta ^{\prime}  Mixing from the Chiral Lagrangian}",
  doi = "10.22323/1.119.0019",
  journal = "PoS",
  year = 2010,
  volume = "LC2010",
  pages = "019"
}