@misc{indiciae7b755070713c,
  title = {Modeling heart rate variability by stochastic feedback},
  author = {Amaral, L. A. and Goldberger, A. L. and Stanley, H. E.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20040088956},
  note = {Source identifier: 20040088956}
}