@misc{indiciaef33e6391333a,
  title = {Structural relationships between measures based on heart beat intervals: potential for improved risk assessment.},
  author = {Alfred P Hallstrom and Phyllis K Stein and Raphael Schneider and Morrison Hodges and Georg Schmidt and Kurt Ulm},
  year = {2004},
  doi = {10.1109/tbme.2004.828049},
  url = {https://pubmed.ncbi.nlm.nih.gov/15311827/},
  note = {Source identifier: 15311827}
}