@article{Babichev:2008aY,
  author = "Babichev, Eugeny",
  title = "{"Superluminal" scalar fields and black holes}",
  doi = "10.22323/1.043.0006",
  journal = "PoS",
  year = 2008,
  volume = "QG-Ph",
  pages = "006"
}