@misc{indiciae749dbc1daecd,
  title = {[Long term electrocardiography].},
  author = {H Zapfe},
  year = {1969},
  doi = {10.1007/bf01725629},
  url = {https://pubmed.ncbi.nlm.nih.gov/4905323/},
  note = {Source identifier: 4905323}
}