@misc{indiciaeb5e82dd8fa5d,
  title = {New pacemaker pulse counter. Simple method for determining pacemaker activity.},
  author = {S J Gulotta and A L Aronson},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4503216/},
  note = {Source identifier: 4503216}
}