@misc{indiciae1df1020d06e0,
  title = {[A heart rate adaptable "physiologic" pacemaker. Is the effort worthwhile?].},
  author = {M Sigmund and R Uebis},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2661379/},
  note = {Source identifier: 2661379}
}