@article{Nyffeler:2010Kl,
  author = "Nyffeler, Andreas",
  title = "{Hadronic light-by-light scattering in the muon g-2: a new short-distance  constraint on pion exchange }",
  doi = "10.22323/1.086.0080",
  journal = "PoS",
  year = 2010,
  volume = "CD09",
  pages = "080"
}