@misc{indiciae9692fe152e10,
  title = {A spherical impulse gravity wave.},
  author = {PA Hogan},
  year = {1993},
  doi = {10.1103/physrevlett.70.117},
  url = {https://pubmed.ncbi.nlm.nih.gov/10053706/},
  note = {Source identifier: 10053706}
}