@misc{indiciae506e02eb9d8d,
  title = {Coexisting ventricular and blocked atrial parasystole.},
  author = {J P O'Neil and L A Papa and E K Chung},
  year = {1976},
  doi = {10.1016/s0022-0736(76)80075-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/57203/},
  note = {Source identifier: 57203}
}