Die Kur - Kraft für Körper, Seele und den Alltag
Terman M., et.al.
American Journal of Psychiatry 163(12):2126-33 · January 2007
https://www.researchgate.net/publication/6648580_Controlled_Trial_of_Naturalistic_Dawn_Simulation_and_Negative_Air_Ionization_for_Seasonal_Affective_Disorder
