Die Kur - Kraft für Körper, Seele und den Alltag
Hyenyun K., et.al
International Journal of Environmental Research and Public Health 16(14):2449 · July 2019
https://www.researchgate.net/publication/334383576_An_Exploratory_Study_on_the_Effects_of_Forest_Therapy_on_Sleep_Quality_in_Patients_with_Gastrointestinal_Tract_Cancers