@inbook{3b855cc61cc945b59d9a00ca1bef3ec6,
title = "Circadian Rhythm of Heart Rate and Heart Rate Variability",
keywords = "Circadian rhythms, Heart rate variability (HRV), Low frequency spectral power (LF), Normal-to-normal interbeat intervals(NNS), Sleep-wake cycle",
author = "Stein, {Phyllis K.}",
year = "2007",
month = oct,
day = "25",
doi = "10.1002/9780470987483.ch8",
language = "English",
isbn = "0405119608",
pages = "65--72",
booktitle = "Dynamic Electrocardiography",
publisher = "wiley",
}