@misc{indiciaea3bd88d9bbfd,
  title = {Trapped surfaces on a spherically symmetric initial data set.},
  author = {T Zannias},
  year = {1992},
  doi = {10.1103/physrevd.45.2998},
  url = {https://pubmed.ncbi.nlm.nih.gov/10014695/},
  note = {Source identifier: 10014695}
}