@misc{indiciaebf900b0eeb20,
  title = {Electronic circuit detects left ventricular ejection events in cardiovascular system},
  author = {Gebben, V. D. and Webb, J. A., Jr.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720000511},
  note = {Source identifier: 19720000511}
}