@misc{indiciae3d1181c119fb,
  title = {[Sinoatrial node: comments on its function and structure].},
  author = {M Lesiak and S Grajek},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2082074/},
  note = {Source identifier: 2082074}
}