V. . C V and A. . Joseph, “Evaluation of Natural Radioactivity Levels and Exhalation rate of 222Rn and 220Rn in the Soil Samples from the Kuthiran Hills, Kerala, India”, J. Nucl. Phy. Mat. Sci. Rad. A., vol. 9, no. 2, pp. 229–239, Jun. 2022.