[1]
C. D. Nguyen, M. Kopeć, and J. Nowak, “Factors controlling 226Ra, 228Ra and their activity ratio in groundwater – an application in Polish Carpathian mineral waters”,
geol
, vol. 42, no. 3, p. 337, Feb. 2017, doi:
10.7494/geol.2016.42.3.337
.