TY  - RPRT
TI  - Coarse-graining spectral analysis: new method for studying heart rate variability.
AU  - Y Yamamoto
AU  - R L Hughson
PY  - 1991
DO  - 10.1152/jappl.1991.71.3.1143
UR  - https://pubmed.ncbi.nlm.nih.gov/1757311/
ID  - 1757311
ER  -