@misc{indiciae1ae8409712ba,
  title = {Photoplethysmograph from a laser source.},
  author = {N E Almond and E D Cooke},
  year = {1991},
  doi = {10.1007/bf02442333},
  url = {https://pubmed.ncbi.nlm.nih.gov/1817224/},
  note = {Source identifier: 1817224}
}