1. Family history and symptomatology in seasonal and nonseasonal depression;Allen,1991
2. DSM-III-R: Diagnostic and Statistical Manual of Mental Disorders;American Psychiatric Association,1987
3. The temperature rhythm is phase-delayed in winter depression;Avery;Biological Psychiatry,1990
4. Do winter depressives experience summer nights in winter?;Beersma;Archives of General Psychiatry,1990
5. Electrical phenomena in the retina;Berson,1975