@misc{indiciaeafc18bb56c94,
  title = {Nonlinear solutions for initial data in the vacuum Einstein equations in plane symmetry.},
  author = {P Anninos and J Centrella and R Matzner},
  year = {1989},
  doi = {10.1103/physrevd.39.2155},
  url = {https://pubmed.ncbi.nlm.nih.gov/9959894/},
  note = {Source identifier: 9959894}
}