@misc{indiciae3df091081d9b,
  title = {[A frequency-varied heart-stimulating pacemaker system is under further development].},
  author = {L Rydén and I Kruse and P Smedgård},
  year = {1984},
  url = {https://pubmed.ncbi.nlm.nih.gov/6492949/},
  note = {Source identifier: 6492949}
}