@misc{indiciae2ca27a3fecbf,
  title = {Maximally slicing a black hole.},
  author = {Estabrook, F. and Wahlquist, H. and Christensen, S. and Dewitt, B. and Smarr, L. and Tsiang, E.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730048319},
  note = {Source identifier: 19730048319}
}