@inproceedings{Saul:20130H,
  author = "Saul, Martin",
  title = "{The Differential in Astronomy : Past to Present}",
  doi = "10.22323/1.170.0046",
  booktitle = "Proceedings of From Antikythera to the Square Kilometre Array: Lessons from the Ancients {\textemdash} PoS(Antikythera & SKA)",
  year = 2013,
  volume = "170",
  pages = "046"
}