@misc{indiciae5a58303ef5b3,
  title = {Frequency analysis of the P wave: comparative techniques.},
  author = {P Stafford and P Denbigh and R Vincent},
  year = {1995},
  doi = {10.1111/j.1540-8159.1995.tb02516.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7731874/},
  note = {Source identifier: 7731874}
}