@misc{indiciae48249e4d976f,
  title = {Instantaneous cardiac tachometer with extendable range.},
  author = {A J Cousin and K C Smith},
  year = {1978},
  doi = {10.1007/bf02442654},
  url = {https://pubmed.ncbi.nlm.nih.gov/308585/},
  note = {Source identifier: 308585}
}