TY  - RPRT
TI  - Wavelet packet transform for R-R interval variability.
AU  - Kunihiko Tanaka
AU  - Alan R Hargens
PY  - 2004
DO  - 10.1016/j.medengphy.2004.01.007
UR  - https://pubmed.ncbi.nlm.nih.gov/15121056/
ID  - 15121056
ER  -