@misc{indiciaebde723d7a736,
  title = {Caustics for spherical waves},
  author = {de Rham, Claudia and Motohashi, Hayato},
  year = {2017},
  doi = {10.1103/physrevd.95.064008},
  url = {https://www.osti.gov/biblio/1423957},
  note = {Source identifier: 1423957}
}