2019, An Exploratory Study on the Effects of Forest Therapy on Sleep Quality in Patients with Gastrointestinal Tract Cancers 25. April 2020 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
