TY  - RPRT
TI  - Long-term spectral analysis of heart rate variability--an algorithm based on segmental frequency distributions of beat-to-beat intervals.
AU  - M Malik
AU  - T Cripps
AU  - T Farrell
AU  - A J Camm
PY  - 1989
DO  - 10.1016/0020-7101(89)90012-3
UR  - https://pubmed.ncbi.nlm.nih.gov/2777402/
ID  - 2777402
ER  -