TY  - RPRT
TI  - External time--internal time.
AU  - Serge Daan
AU  - Martha Merrow
AU  - Till Roenneberg
PY  - 2002
DO  - 10.1177/074873002129002375
UR  - https://pubmed.ncbi.nlm.nih.gov/12002157/
ID  - 12002157
ER  -