@misc{indiciae0077e2e28b09,
  title = {Helicopters.},
  author = {A Wilson and F Cross},
  year = {1992},
  doi = {10.1177/014107689208500101},
  url = {https://pubmed.ncbi.nlm.nih.gov/1548646/},
  note = {Source identifier: 1548646}
}