1. Blehar MC, Rosenthal NE (1989) Seasonal affective disorders and phototherapy. Report of a National Institute of Mental Health sponsored Workshop. Arch Gen Psychiatry 46: 469–474
2. Cleaves MA (1904) Light energy: its physics, physiological action and therapeutic applications. Rebman Limited, London
3. Eastman CI, Lahmeyer HW, Watell LG, Good GD, Young MA (1992) A placebo-controlled trial of light treatment for winter depression. J Affect Disord 26(4): 211–221
4. Eastman CI, Young MA, Fogg LF, Liu L, Meaden PM (1998) Bright light treatment of winter depression: a placebo-controlled trial. Arch Gen Psychiatry 55(10): 883–889
5. Erkwoh R (1986) Schlafende Depression. Psychopathologische und biochemische Befunde einer Einzelfallanalyse. Nervenarzt 57: 538–541