@article{Eckstein:2016KU,
  author = "Eckstein, Michal  and  Franco, Nicolas",
  title = "{Causal structure for noncommutative geometry}",
  doi = "10.22323/1.224.0138",
  journal = "PoS",
  year = 2016,
  volume = "FFP14",
  pages = "138"
}