@inproceedings{Unruh:2008qm,
  author = "Unruh, William G.",
  title = "{Dumb holes}",
  doi = "10.22323/1.043.0039",
  booktitle = "Proceedings of From Quantum to Emergent Gravity: Theory and Phenomenology {\textemdash} PoS(QG-Ph)",
  year = 2008,
  volume = "043",
  pages = "039"
}