@misc{indiciaecf6bd5c2aec1,
  title = {Quantitative photoplethysmography.},
  author = {L T Jespersen and O Lederballe},
  year = {1986},
  url = {https://pubmed.ncbi.nlm.nih.gov/3941997/},
  note = {Source identifier: 3941997}
}