@misc{indiciae2740a8d5b658,
  title = {A visual warning device for improved safety.},
  author = {L Williams and C Barton and J R McVey and J D Smith},
  year = {1986},
  doi = {10.1213/00000539-198612000-00021},
  url = {https://pubmed.ncbi.nlm.nih.gov/3777469/},
  note = {Source identifier: 3777469}
}