@misc{indiciae6d9c3cc0d504,
  title = {[Approximate entropy and its application in heart rate variability analysis].},
  author = {H G Gu and W Ren and G Liu and X Y Shen and J R Meng},
  year = {2000},
  url = {https://pubmed.ncbi.nlm.nih.gov/11767785/},
  note = {Source identifier: 11767785}
}