@article{Zipfel:2016zk,
  author = "Zipfel, Antonia",
  title = "{Plebanski sectors of the Lorentzian 4-simplex amplitude}",
  doi = "10.22323/1.224.0181",
  journal = "PoS",
  year = 2016,
  volume = "FFP14",
  pages = "181"
}