@misc{indiciaeacfc98f47deb,
  title = {Electrocardiographic cancellation: mathematical basis.},
  author = {R A HELM},
  year = {1960},
  doi = {10.1016/0002-8703(60)90101-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14400924/},
  note = {Source identifier: 14400924}
}