Nguyen CD, Kopeć M, Nowak J. Factors controlling 226Ra, 228Ra and their activity ratio in groundwater – an application in Polish Carpathian mineral waters. geol [Internet]. 2017 Feb. 16 [cited 2025 Mar. 14];42(3):337. Available from: https://journals.agh.edu.pl/geol/article/view/2020