@misc{indiciae83a6e1c9776d,
  title = {Electrocardiogram signal analyzer},
  author = {Portnoy, W. M. and Dirilten, H. and Burton, C. E.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750000269},
  note = {Source identifier: 19750000269}
}