1. Akerblom G, Lindgren J (1997) Mapping of groundwater radon potential. Eur Geol 5:13–22
2. Chi SJ, Yun U, Hong YK, Kim TG, Kim KH (2005) Surface intensity of radioactivity and uranium contents according to geology in Ogcheon Belt. In: Proceedings of the 38th meeting of the Korea Society of Economic and Environmental Geology, Seoul, Korea, 21–22 April 2005
3. Cho BW, Yun U, Choo CO (2010) Uranium and radon concentration in groundwater of Daejeon area, Korea. IAH (International Association of Hydrogeologists) Congress. In: Proceedings of a groundwater quality sustainability, Krakow, Poland, 12–17 Sept 2010
4. Choi DK, Ree JH, Woo JS, Park TY (2013) Stratigraphy and geologic structure of the Ogcheon supergroup in the lake Chungju area, Korea. 2013 Spring field trip guidebook of the Geological Society of Korea, p 44
5. Choo CO (2002) Characteristics of uraniferous minerals in Daebo granite and significance of mineral species. J Miner Soc Korea 15:11–21