@article{Guo:2012Tq,
  author = "Guo, Zhi-Hui  and  Oller, José Antonio  and  Ruiz de Elvira, Jacobo",
  title = "{Recent developments in U(3) \chi PT: meson-meson scattering and finite energy sum rules }",
  doi = "10.22323/1.157.0066",
  journal = "PoS",
  year = 2012,
  volume = "QNP2012",
  pages = "066"
}