@article{Gan:2013It,
  author = "Gan, Liping",
  title = "{The Upper Energy Limit of Heavy Baryon Chiral Perturbation Theory in pion photoproduction }",
  doi = "10.22323/1.172.0117",
  journal = "PoS",
  year = 2013,
  volume = "CD12",
  pages = "117"
}