@misc{indiciae42d467512d3b,
  title = {Flexible ruler.},
  author = {J M Bryan},
  year = {1990},
  doi = {10.1093/ptj/70.6.397},
  url = {https://pubmed.ncbi.nlm.nih.gov/2345783/},
  note = {Source identifier: 2345783}
}