@misc{indiciae70f9c0de43db,
  title = {A simple method to determine the electrocardiographic frontal plane axis.},
  author = {A H Hakki and G J Anderson and A S Iskandrian and B L Segal},
  year = {1982},
  doi = {10.1016/s0022-0736(82)80031-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/7119639/},
  note = {Source identifier: 7119639}
}