@misc{indiciaeacb8ae69b623,
  title = {Nonlinear wave solutions to the planar vacuum Einstein equations.},
  author = {P Anninos and J Centrella and RA Matzner},
  year = {1991},
  doi = {10.1103/physrevd.43.1825},
  url = {https://pubmed.ncbi.nlm.nih.gov/10013558/},
  note = {Source identifier: 10013558}
}