@misc{indiciae860043338413,
  title = {PR interval behavior during exercise: implications for physiological pacemakers.},
  author = {R M Luceri and S L Brownstein and L Vardeman and S Goldstein},
  year = {1990},
  doi = {10.1111/j.1540-8159.1990.tb06878.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1704529/},
  note = {Source identifier: 1704529}
}