TY  - RPRT
TI  - Primary insomnia: a risk factor to develop depression?
AU  - Dieter Riemann
AU  - Ulrich Voderholzer
PY  - 2003
DO  - 10.1016/s0165-0327(02)00072-1
UR  - https://pubmed.ncbi.nlm.nih.gov/12943956/
ID  - 12943956
ER  -