Um, Sun-Bi, and Jung-Sup Um. “Metropolitan Urban Hotspots of Chronic Sleep Deprivation: Evidence from a Community Health Survey in Gyeongbuk Province, South Korea”. Geospatial Health 10, no. 2 (November 4, 2015). Accessed October 11, 2024. https://www.geospatialhealth.net/gh/article/view/382.