@misc{indiciae3197bfd6118c,
  title = {Einstein–Rosen waves and the Geroch group},
  author = {Penna, Robert F.},
  year = {2021},
  doi = {10.1063/5.0061929},
  url = {https://www.osti.gov/biblio/1839904},
  note = {Source identifier: 1839904}
}