TY  - RPRT
TI  - Automatic sleep/wake identification from wrist activity.
AU  - R J Cole
AU  - D F Kripke
AU  - W Gruen
AU  - D J Mullaney
AU  - J C Gillin
PY  - 1992
DO  - 10.1093/sleep/15.5.461
UR  - https://pubmed.ncbi.nlm.nih.gov/1455130/
ID  - 1455130
ER  -