Finding black holes in numerical spacetimes.

@article{Hughes1994FindingBH,
  title={Finding black holes in numerical spacetimes.},
  author={John Hughes and Keeton and J R Walker and Walsh and S C Shapiro and Teukolsky},
  journal={Physical review. D, Particles and fields},
  year={1994},
  volume={49 8},
  pages={4004-4015}
}