@misc{indiciae710abb9588c6,
  title = {A simple modified technique for recording sinus node electrogram.},
  author = {D L Zhang and S L Chen},
  year = {1988},
  doi = {10.1002/ccd.1810150115},
  url = {https://pubmed.ncbi.nlm.nih.gov/3409316/},
  note = {Source identifier: 3409316}
}