@misc{indiciae4705a528aa02,
  title = {A truly three-dimensional vectorcardiographic display.},
  author = {V Kalff and W J Perkins and D J Dewhurst and E R Trethewie},
  year = {1974},
  doi = {10.1016/0010-4825(74)90015-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4455434/},
  note = {Source identifier: 4455434}
}