@article{vanHameren:2014en,
  author = "van Hameren, Andreas",
  title = "{Helicity amplitudes for high-energy scattering processes}",
  doi = "10.22323/1.197.0036",
  journal = "PoS",
  year = 2014,
  volume = "RADCOR 2013",
  pages = "036"
}