TY  - RPRT
TI  - Determining heart-rate variability: comparing methodologies using computer simulations.
AU  - J D Harry
AU  - R Freeman
PY  - 1993
DO  - 10.1002/mus.880160305
UR  - https://pubmed.ncbi.nlm.nih.gov/8446124/
ID  - 8446124
ER  -