@misc{indiciaec59e6a0bc5f0,
  title = {A laser back pointer.},
  author = {P F Klemp},
  year = {1977},
  doi = {10.1088/0031-9155/22/5/023},
  url = {https://pubmed.ncbi.nlm.nih.gov/909914/},
  note = {Source identifier: 909914}
}