@misc{indiciae28470e5fa885,
  title = {Average trapped surfaces on an arbitrary initial data set.},
  author = {T Zannias},
  year = {1993},
  doi = {10.1103/physrevd.47.1448},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015722/},
  note = {Source identifier: 10015722}
}