@misc{indiciae8caa5ce3422a,
  title = {The third heart sound.},
  author = {A J Timmis},
  year = {1987},
  doi = {10.1136/bmj.294.6568.326-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/3101861/},
  note = {Source identifier: 3101861}
}