TY  - RPRT
TI  - Sleeping problems at 78 degrees north: the Svalbard Study.
AU  - O Nilssen
AU  - R Lipton
AU  - T Brenn
AU  - G Höyer
AU  - E Boiko
AU  - A Tkatchev
PY  - 1997
DO  - 10.1111/j.1600-0447.1997.tb00372.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9051160/
ID  - 9051160
ER  -