@article{Benedikt:2016pc,
  author = "Benedikt, Michael  and  Zimmermann, Frank",
  title = "{Future High Energy Circular Colliders}",
  doi = "10.22323/1.245.0052",
  journal = "PoS",
  year = 2016,
  volume = "LeptonPhoton2015",
  pages = "052"
}