TY  - RPRT
TI  - [Approximation of sleep duration and sleep efficiency using actography].
AU  - F Wallner
AU  - J Backhaus
AU  - F Hohagen
AU  - D Riemann
PY  - 1995
UR  - https://pubmed.ncbi.nlm.nih.gov/8588383/
ID  - 8588383
ER  -