@misc{indiciaec1c1bc6b8bdf,
  title = {Directional flow detection for localizing venous valvular incompetency.},
  author = {R Folse and R H Alexander},
  year = {1970},
  url = {https://pubmed.ncbi.nlm.nih.gov/5409849/},
  note = {Source identifier: 5409849}
}