@misc{indiciae9fe5725d0e12,
  title = {Black hole echoes},
  author = {D’Amico, Guido and Kaloper, Nemanja},
  year = {2020},
  doi = {10.1103/physrevd.102.044001},
  url = {https://www.osti.gov/biblio/1802005},
  note = {Source identifier: 1802005}
}